91975654 has 4 divisors (see below), whose sum is σ = 137963484. Its totient is φ = 45987826.

The previous prime is 91975651. The next prime is 91975679. The reversal of 91975654 is 45657919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45657919 = 29 ⋅1574411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91975651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22993912 + ... + 22993915.

It is an arithmetic number, because the mean of its divisors is an integer number (34490871).

Almost surely, 2^91975654 is an apocalyptic number.

91975654 is a deficient number, since it is larger than the sum of its proper divisors (45987830).

91975654 is a wasteful number, since it uses less digits than its factorization.

91975654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45987829.

The product of its digits is 340200, while the sum is 46.

The square root of 91975654 is about 9590.3938396710. The cubic root of 91975654 is about 451.3959188219.

It can be divided in two parts, 91975 and 654, that added together give a palindrome (92629).

The spelling of 91975654 in words is "ninety-one million, nine hundred seventy-five thousand, six hundred fifty-four".