91507901 has 2 divisors, whose sum is σ = 91507902. Its totient is φ = 91507900.

The previous prime is 91507883. The next prime is 91507907. The reversal of 91507901 is 10970519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90231001 + 1276900 = 9499^2 + 1130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91507901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91507907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45753950 + 45753951.

It is an arithmetic number, because the mean of its divisors is an integer number (45753951).

Almost surely, 2^91507901 is an apocalyptic number.

It is an amenable number.

91507901 is a deficient number, since it is larger than the sum of its proper divisors (1).

91507901 is an equidigital number, since it uses as much as digits as its factorization.

91507901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 91507901 is about 9565.9762178253. The cubic root of 91507901 is about 450.6294089556.

The spelling of 91507901 in words is "ninety-one million, five hundred seven thousand, nine hundred one".