676405631 has 4 divisors (see below), whose sum is σ = 737897064. Its totient is φ = 614914200.

The previous prime is 676405619. The next prime is 676405633. The reversal of 676405631 is 136504676.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 676405631 - 2²² = 672211327 is a prime.

It is a super-2 number, since 2×676405631² = 915049155297016322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676405633) 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, 30745700 + ... + 30745721.

It is an arithmetic number, because the mean of its divisors is an integer number (184474266).

Almost surely, 2^676405631 is an apocalyptic number.

676405631 is a deficient number, since it is larger than the sum of its proper divisors (61491433).

676405631 is a wasteful number, since it uses less digits than its factorization.

676405631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61491432.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 676405631 is about 26007.7994263259. The cubic root of 676405631 is about 877.8138015084.

The spelling of 676405631 in words is "six hundred seventy-six million, four hundred five thousand, six hundred thirty-one".