291125963 has 2 divisors, whose sum is σ = 291125964. Its totient is φ = 291125962.

The previous prime is 291125869. The next prime is 291125993. The reversal of 291125963 is 369521192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 291125963 - 2¹² = 291121867 is a prime.

It is not a weakly prime, because it can be changed into another prime (291125993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145562981 + 145562982.

It is an arithmetic number, because the mean of its divisors is an integer number (145562982).

Almost surely, 2^291125963 is an apocalyptic number.

291125963 is a deficient number, since it is larger than the sum of its proper divisors (1).

291125963 is an equidigital number, since it uses as much as digits as its factorization.

291125963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 38.

The square root of 291125963 is about 17062.4137506978. The cubic root of 291125963 is about 662.7661400398.

The spelling of 291125963 in words is "two hundred ninety-one million, one hundred twenty-five thousand, nine hundred sixty-three".