672529621 has 2 divisors, whose sum is σ = 672529622. Its totient is φ = 672529620.

The previous prime is 672529603. The next prime is 672529709. The reversal of 672529621 is 126925276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667188900 + 5340721 = 25830^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 672529621 - 2⁷ = 672529493 is a prime.

It is a super-2 number, since 2×672529621² = 904592182244807282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672529021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336264810 + 336264811.

It is an arithmetic number, because the mean of its divisors is an integer number (336264811).

Almost surely, 2^672529621 is an apocalyptic number.

It is an amenable number.

672529621 is a deficient number, since it is larger than the sum of its proper divisors (1).

672529621 is an equidigital number, since it uses as much as digits as its factorization.

672529621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 672529621 is about 25933.1760685034. The cubic root of 672529621 is about 876.1338752220.

The spelling of 672529621 in words is "six hundred seventy-two million, five hundred twenty-nine thousand, six hundred twenty-one".