672610391 has 2 divisors, whose sum is σ = 672610392. Its totient is φ = 672610390.

The previous prime is 672610381. The next prime is 672610403. The reversal of 672610391 is 193016276.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672610391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672610361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336305195 + 336305196.

It is an arithmetic number, because the mean of its divisors is an integer number (336305196).

Almost surely, 2^672610391 is an apocalyptic number.

672610391 is a deficient number, since it is larger than the sum of its proper divisors (1).

672610391 is an equidigital number, since it uses as much as digits as its factorization.

672610391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 672610391 is about 25934.7332934040. The cubic root of 672610391 is about 876.1689480268.

The spelling of 672610391 in words is "six hundred seventy-two million, six hundred ten thousand, three hundred ninety-one".