718477891 has 12 divisors (see below), whose sum is σ = 739566736. Its totient is φ = 697970880.

The previous prime is 718477889. The next prime is 718477901. The reversal of 718477891 is 198774817.

It is not a de Polignac number, because 718477891 - 2¹ = 718477889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718477811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464866 + ... + 466408.

Almost surely, 2^718477891 is an apocalyptic number.

718477891 is a deficient number, since it is larger than the sum of its proper divisors (21088845).

718477891 is a wasteful number, since it uses less digits than its factorization.

718477891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902 (or 1861 counting only the distinct ones).

The product of its digits is 790272, while the sum is 52.

The square root of 718477891 is about 26804.4378974826. The cubic root of 718477891 is about 895.6489123758.

The spelling of 718477891 in words is "seven hundred eighteen million, four hundred seventy-seven thousand, eight hundred ninety-one".