291325057 has 4 divisors (see below), whose sum is σ = 291368896. Its totient is φ = 291281220.

The previous prime is 291325037. The next prime is 291325079. The reversal of 291325057 is 750523192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 291325057 - 2¹⁵ = 291292289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291325037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9669 + ... + 26002.

It is an arithmetic number, because the mean of its divisors is an integer number (72842224).

Almost surely, 2^291325057 is an apocalyptic number.

It is an amenable number.

291325057 is a deficient number, since it is larger than the sum of its proper divisors (43839).

291325057 is an equidigital number, since it uses as much as digits as its factorization.

291325057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43838.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 291325057 is about 17068.2470394590. The cubic root of 291325057 is about 662.9171888529.

The spelling of 291325057 in words is "two hundred ninety-one million, three hundred twenty-five thousand, fifty-seven".