634501869 has 4 divisors (see below), whose sum is σ = 846002496. Its totient is φ = 423001244.

The previous prime is 634501807. The next prime is 634501873. The reversal of 634501869 is 968105436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 634501869 - 2²³ = 626113261 is a prime.

It is a super-2 number, since 2×634501869² = 805185243528986322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 634501869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634501969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105750309 + ... + 105750314.

It is an arithmetic number, because the mean of its divisors is an integer number (211500624).

Almost surely, 2^634501869 is an apocalyptic number.

It is an amenable number.

634501869 is a deficient number, since it is larger than the sum of its proper divisors (211500627).

634501869 is a wasteful number, since it uses less digits than its factorization.

634501869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211500626.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 634501869 is about 25189.3205347028. The cubic root of 634501869 is about 859.2989911203.

It can be divided in two parts, 634 and 501869, that added together give a triangular number (502503 = T₁₀₀₂).

The spelling of 634501869 in words is "six hundred thirty-four million, five hundred one thousand, eight hundred sixty-nine".