291916972 has 12 divisors (see below), whose sum is σ = 515629800. Its totient is φ = 144594176.

The previous prime is 291916949. The next prime is 291917009. The reversal of 291916972 is 279619192.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340597 + ... + 341452.

It is an arithmetic number, because the mean of its divisors is an integer number (42969150).

Almost surely, 2^291916972 is an apocalyptic number.

It is an amenable number.

291916972 is a deficient number, since it is larger than the sum of its proper divisors (223712828).

291916972 is a wasteful number, since it uses less digits than its factorization.

291916972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682160 (or 682158 counting only the distinct ones).

The product of its digits is 122472, while the sum is 46.

The square root of 291916972 is about 17085.5778948211. The cubic root of 291916972 is about 663.3658574043.

It can be divided in two parts, 29191 and 6972, that added together give a palindrome (36163).

The spelling of 291916972 in words is "two hundred ninety-one million, nine hundred sixteen thousand, nine hundred seventy-two".