91725259 has 2 divisors, whose sum is σ = 91725260. Its totient is φ = 91725258.

The previous prime is 91725253. The next prime is 91725299. The reversal of 91725259 is 95252719.

It is an a-pointer prime, because the next prime (91725299) can be obtained adding 91725259 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91725259 - 2⁷ = 91725131 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91725253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45862629 + 45862630.

It is an arithmetic number, because the mean of its divisors is an integer number (45862630).

Almost surely, 2^91725259 is an apocalyptic number.

91725259 is a deficient number, since it is larger than the sum of its proper divisors (1).

91725259 is an equidigital number, since it uses as much as digits as its factorization.

91725259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 91725259 is about 9577.3304735714. The cubic root of 91725259 is about 450.9859190003.

The spelling of 91725259 in words is "ninety-one million, seven hundred twenty-five thousand, two hundred fifty-nine".