291132047 has 2 divisors, whose sum is σ = 291132048. Its totient is φ = 291132046.

The previous prime is 291132029. The next prime is 291132167. The reversal of 291132047 is 740231192.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 291132047 - 2¹⁰ = 291131023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291132007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145566023 + 145566024.

It is an arithmetic number, because the mean of its divisors is an integer number (145566024).

Almost surely, 2^291132047 is an apocalyptic number.

291132047 is a deficient number, since it is larger than the sum of its proper divisors (1).

291132047 is an equidigital number, since it uses as much as digits as its factorization.

291132047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 291132047 is about 17062.5920363818. The cubic root of 291132047 is about 662.7707568742.

The spelling of 291132047 in words is "two hundred ninety-one million, one hundred thirty-two thousand, forty-seven".