291745984129 has 2 divisors, whose sum is σ = 291745984130. Its totient is φ = 291745984128.

The previous prime is 291745984097. The next prime is 291745984169. The reversal of 291745984129 is 921489547192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251729982529 + 40016001600 = 501727^2 + 200040^2 .

It is a cyclic number.

It is not a de Polignac number, because 291745984129 - 2⁵ = 291745984097 is a prime.

It is not a weakly prime, because it can be changed into another prime (291745984169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145872992064 + 145872992065.

It is an arithmetic number, because the mean of its divisors is an integer number (145872992065).

Almost surely, 2^291745984129 is an apocalyptic number.

It is an amenable number.

291745984129 is a deficient number, since it is larger than the sum of its proper divisors (1).

291745984129 is an equidigital number, since it uses as much as digits as its factorization.

291745984129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 61.

The spelling of 291745984129 in words is "two hundred ninety-one billion, seven hundred forty-five million, nine hundred eighty-four thousand, one hundred twenty-nine".