672520489 has 3 divisors (see below), whose sum is σ = 672546423. Its totient is φ = 672494556.

The previous prime is 672520487. The next prime is 672520507. The reversal of 672520489 is 984025276.

The square root of 672520489 is 25933.

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., 147744025 + 524776464 = 12155^2 + 22908^2 .

It is not a de Polignac number, because 672520489 - 2¹ = 672520487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672520487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12967 + ... + 38899.

It is an arithmetic number, because the mean of its divisors is an integer number (224182141).

Almost surely, 2^672520489 is an apocalyptic number.

672520489 is the 25933-rd square number.

672520489 is the 12967-th centered octagonal number.

It is an amenable number.

672520489 is a deficient number, since it is larger than the sum of its proper divisors (25934).

672520489 is an frugal number, since it uses more digits than its factorization.

672520489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51866 (or 25933 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The cubic root of 672520489 is about 876.1299096516.

The spelling of 672520489 in words is "six hundred seventy-two million, five hundred twenty thousand, four hundred eighty-nine".