291214164 has 12 divisors (see below), whose sum is σ = 679499744. Its totient is φ = 97071384.

The previous prime is 291214163. The next prime is 291214177. The reversal of 291214164 is 461412192.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291214163) 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, 12133912 + ... + 12133935.

Almost surely, 2^291214164 is an apocalyptic number.

It is an amenable number.

291214164 is an abundant number, since it is smaller than the sum of its proper divisors (388285580).

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

291214164 is a wasteful number, since it uses less digits than its factorization.

291214164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24267854 (or 24267852 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 291214164 is about 17064.9982127160. The cubic root of 291214164 is about 662.8330649466.

The spelling of 291214164 in words is "two hundred ninety-one million, two hundred fourteen thousand, one hundred sixty-four".