671453631 has 10 divisors (see below), whose sum is σ = 1003035792. Its totient is φ = 447635700.

The previous prime is 671453623. The next prime is 671453633. The reversal of 671453631 is 136354176.

671453631 is a `hidden beast` number, since 6 + 7 + 14 + 5 + 3 + 631 = 666.

It is not a de Polignac number, because 671453631 - 2³ = 671453623 is a prime.

It is a super-2 number, since 2×671453631² = 901699957166168322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671453633) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4144695 + ... + 4144856.

Almost surely, 2^671453631 is an apocalyptic number.

671453631 is a deficient number, since it is larger than the sum of its proper divisors (331582161).

671453631 is an equidigital number, since it uses as much as digits as its factorization.

671453631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8289563 (or 8289554 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 671453631 is about 25912.4223298402. The cubic root of 671453631 is about 875.6663793384. Note that the first 3 decimals are identical.

The spelling of 671453631 in words is "six hundred seventy-one million, four hundred fifty-three thousand, six hundred thirty-one".