213979692 has 12 divisors (see below), whose sum is σ = 499285976. Its totient is φ = 71326560.

The previous prime is 213979687. The next prime is 213979699. The reversal of 213979692 is 296979312.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (213979699) 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, 8915809 + ... + 8915832.

Almost surely, 2^213979692 is an apocalyptic number.

It is an amenable number.

213979692 is an abundant number, since it is smaller than the sum of its proper divisors (285306284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213979692 is a wasteful number, since it uses less digits than its factorization.

213979692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17831648 (or 17831646 counting only the distinct ones).

The product of its digits is 367416, while the sum is 48.

The square root of 213979692 is about 14628.0447087094. The cubic root of 213979692 is about 598.1234816945.

The spelling of 213979692 in words is "two hundred thirteen million, nine hundred seventy-nine thousand, six hundred ninety-two".