671994435 has 16 divisors (see below), whose sum is σ = 1228790016. Its totient is φ = 307197408.

The previous prime is 671994403. The next prime is 671994437. The reversal of 671994435 is 534499176.

It is not a de Polignac number, because 671994435 - 2⁵ = 671994403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671994437) 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, 3199869 + ... + 3200078.

It is an arithmetic number, because the mean of its divisors is an integer number (76799376).

Almost surely, 2^671994435 is an apocalyptic number.

671994435 is a deficient number, since it is larger than the sum of its proper divisors (556795581).

671994435 is a wasteful number, since it uses less digits than its factorization.

671994435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6399962.

The product of its digits is 816480, while the sum is 48.

The square root of 671994435 is about 25922.8554561414. The cubic root of 671994435 is about 875.9014101114.

The spelling of 671994435 in words is "six hundred seventy-one million, nine hundred ninety-four thousand, four hundred thirty-five".