91670025 has 12 divisors (see below), whose sum is σ = 151561232. Its totient is φ = 48890640.

The previous prime is 91669999. The next prime is 91670027. The reversal of 91670025 is 52007619.

It is not a de Polignac number, because 91670025 - 2⁵ = 91669993 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91669974 and 91670001.

It is not an unprimeable number, because it can be changed into a prime (91670027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611059 + ... + 611208.

Almost surely, 2^91670025 is an apocalyptic number.

It is an amenable number.

91670025 is a deficient number, since it is larger than the sum of its proper divisors (59891207).

91670025 is a wasteful number, since it uses less digits than its factorization.

91670025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222280 (or 1222275 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 91670025 is about 9574.4464591954. The cubic root of 91670025 is about 450.8953777537.

The spelling of 91670025 in words is "ninety-one million, six hundred seventy thousand, twenty-five".