671029731 has 16 divisors (see below), whose sum is σ = 994761120. Its totient is φ = 447063840.

The previous prime is 671029717. The next prime is 671029741. The reversal of 671029731 is 137920176.

It is a happy number.

It is not a de Polignac number, because 671029731 - 2⁷ = 671029603 is a prime.

It is a super-2 number, since 2×671029731² = 900561799771864722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (671029741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39621 + ... + 53961.

It is an arithmetic number, because the mean of its divisors is an integer number (62172570).

Almost surely, 2^671029731 is an apocalyptic number.

671029731 is a deficient number, since it is larger than the sum of its proper divisors (323731389).

671029731 is a wasteful number, since it uses less digits than its factorization.

671029731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16083 (or 16077 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 671029731 is about 25904.2415638829. The cubic root of 671029731 is about 875.4820662291.

The spelling of 671029731 in words is "six hundred seventy-one million, twenty-nine thousand, seven hundred thirty-one".