91769425 has 36 divisors (see below), whose sum is σ = 130616640. Its totient is φ = 63791200.

The previous prime is 91769399. The next prime is 91769429. The reversal of 91769425 is 52496719.

It is a happy number.

It is not a de Polignac number, because 91769425 - 2⁹ = 91768913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91769429) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 68916 + ... + 70234.

It is an arithmetic number, because the mean of its divisors is an integer number (3628240).

Almost surely, 2^91769425 is an apocalyptic number.

It is an amenable number.

91769425 is a deficient number, since it is larger than the sum of its proper divisors (38847215).

91769425 is a wasteful number, since it uses less digits than its factorization.

91769425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374 (or 1358 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 91769425 is about 9579.6359534170. The cubic root of 91769425 is about 451.0582910974.

It can be divided in two parts, 917694 and 25, that added together give a palindrome (917719).

The spelling of 91769425 in words is "ninety-one million, seven hundred sixty-nine thousand, four hundred twenty-five".