291114139 has 2 divisors, whose sum is σ = 291114140. Its totient is φ = 291114138.

The previous prime is 291114091. The next prime is 291114157. The reversal of 291114139 is 931411192.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291114139 is a prime.

It is a super-2 number, since 2×291114139² = 169494883851422642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 291114139.

It is not a weakly prime, because it can be changed into another prime (291114179) 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 as a sum of consecutive naturals, namely, 145557069 + 145557070.

It is an arithmetic number, because the mean of its divisors is an integer number (145557070).

Almost surely, 2^291114139 is an apocalyptic number.

291114139 is a deficient number, since it is larger than the sum of its proper divisors (1).

291114139 is an equidigital number, since it uses as much as digits as its factorization.

291114139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 31.

The square root of 291114139 is about 17062.0672545855. The cubic root of 291114139 is about 662.7571672308.

The spelling of 291114139 in words is "two hundred ninety-one million, one hundred fourteen thousand, one hundred thirty-nine".