91142291 has 2 divisors, whose sum is σ = 91142292. Its totient is φ = 91142290.

The previous prime is 91142281. The next prime is 91142309. The reversal of 91142291 is 19224119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91142291 - 2¹⁴ = 91125907 is a prime.

It is not a weakly prime, because it can be changed into another prime (91142231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45571145 + 45571146.

It is an arithmetic number, because the mean of its divisors is an integer number (45571146).

Almost surely, 2^91142291 is an apocalyptic number.

91142291 is a deficient number, since it is larger than the sum of its proper divisors (1).

91142291 is an equidigital number, since it uses as much as digits as its factorization.

91142291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 91142291 is about 9546.8471759005. The cubic root of 91142291 is about 450.0284607514.

The spelling of 91142291 in words is "ninety-one million, one hundred forty-two thousand, two hundred ninety-one".