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632673409 = 251532

632673409 has 3 divisors (see below), whose sum is σ = 632698563. Its totient is φ = 632648256.

The previous prime is 632673401. The next prime is 632673413. The reversal of 632673409 is 904376236.

The square root of 632673409 is 25153.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 348009025 + 284664384 = 18655^2 + 16872^2 .

It is not a de Polignac number, because 632673409 - 23 = 632673401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (632673401) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12577 + ... + 37729.

It is an arithmetic number, because the mean of its divisors is an integer number (210899521).

Almost surely, 2632673409 is an apocalyptic number.

632673409 is the 25153-rd square number.

632673409 is the 12577-th centered octagonal number.

It is an amenable number.

632673409 is a deficient number, since it is larger than the sum of its proper divisors (25154).

632673409 is an frugal number, since it uses more digits than its factorization.

632673409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50306 (or 25153 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 40.

The cubic root of 632673409 is about 858.4727757953.

It can be divided in two parts, 632 and 673409, that added together give a square (674041 = 8212).

The spelling of 632673409 in words is "six hundred thirty-two million, six hundred seventy-three thousand, four hundred nine".

Divisors: 1 25153 632673409