291972412 has 12 divisors (see below), whose sum is σ = 511078680. Its totient is φ = 145949936.

The previous prime is 291972409. The next prime is 291972427. The reversal of 291972412 is 214279192.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18063 + ... + 30169.

It is an arithmetic number, because the mean of its divisors is an integer number (42589890).

Almost surely, 2^291972412 is an apocalyptic number.

It is an amenable number.

291972412 is a deficient number, since it is larger than the sum of its proper divisors (219106268).

291972412 is a wasteful number, since it uses less digits than its factorization.

291972412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140 (or 18138 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 291972412 is about 17087.2002387752. The cubic root of 291972412 is about 663.4078495673.

It can be divided in two parts, 2919724 and 12, that added together give a triangular number (2919736 = T₂₄₁₆).

The spelling of 291972412 in words is "two hundred ninety-one million, nine hundred seventy-two thousand, four hundred twelve".