91157629 has 2 divisors, whose sum is σ = 91157630. Its totient is φ = 91157628.

The previous prime is 91157623. The next prime is 91157657. The reversal of 91157629 is 92675119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87048900 + 4108729 = 9330^2 + 2027^2 .

It is a cyclic number.

It is not a de Polignac number, because 91157629 - 2²⁵ = 57603197 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91157591 and 91157600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91157623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45578814 + 45578815.

It is an arithmetic number, because the mean of its divisors is an integer number (45578815).

Almost surely, 2^91157629 is an apocalyptic number.

It is an amenable number.

91157629 is a deficient number, since it is larger than the sum of its proper divisors (1).

91157629 is an equidigital number, since it uses as much as digits as its factorization.

91157629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 91157629 is about 9547.6504439574. The cubic root of 91157629 is about 450.0537038787.

The spelling of 91157629 in words is "ninety-one million, one hundred fifty-seven thousand, six hundred twenty-nine".