291879945 has 48 divisors (see below), whose sum is σ = 580769280. Its totient is φ = 132838272.

The previous prime is 291879901. The next prime is 291879949. The reversal of 291879945 is 549978192.

It is not a de Polignac number, because 291879945 - 2⁸ = 291879689 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 291879891 and 291879900.

It is not an unprimeable number, because it can be changed into a prime (291879949) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 73347 + ... + 77223.

It is an arithmetic number, because the mean of its divisors is an integer number (12099360).

Almost surely, 2^291879945 is an apocalyptic number.

It is an amenable number.

291879945 is a deficient number, since it is larger than the sum of its proper divisors (288889335).

291879945 is a wasteful number, since it uses less digits than its factorization.

291879945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134 (or 4131 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 291879945 is about 17084.4942857551. The cubic root of 291879945 is about 663.3378089196.

The spelling of 291879945 in words is "two hundred ninety-one million, eight hundred seventy-nine thousand, nine hundred forty-five".