91254157 has 2 divisors, whose sum is σ = 91254158. Its totient is φ = 91254156.

The previous prime is 91254139. The next prime is 91254197. The reversal of 91254157 is 75145219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91183401 + 70756 = 9549^2 + 266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91254157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91254197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45627078 + 45627079.

It is an arithmetic number, because the mean of its divisors is an integer number (45627079).

Almost surely, 2^91254157 is an apocalyptic number.

It is an amenable number.

91254157 is a deficient number, since it is larger than the sum of its proper divisors (1).

91254157 is an equidigital number, since it uses as much as digits as its factorization.

91254157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 91254157 is about 9552.7041721180. The cubic root of 91254157 is about 450.2125037487.

The spelling of 91254157 in words is "ninety-one million, two hundred fifty-four thousand, one hundred fifty-seven".