91725307 has 2 divisors, whose sum is σ = 91725308. Its totient is φ = 91725306.

The previous prime is 91725299. The next prime is 91725313. The reversal of 91725307 is 70352719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91725307 - 2³ = 91725299 is a prime.

It is not a weakly prime, because it can be changed into another prime (91725317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45862653 + 45862654.

It is an arithmetic number, because the mean of its divisors is an integer number (45862654).

Almost surely, 2^91725307 is an apocalyptic number.

91725307 is a deficient number, since it is larger than the sum of its proper divisors (1).

91725307 is an equidigital number, since it uses as much as digits as its factorization.

91725307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 91725307 is about 9577.3329794886. The cubic root of 91725307 is about 450.9859976675.

The spelling of 91725307 in words is "ninety-one million, seven hundred twenty-five thousand, three hundred seven".