91997092 has 12 divisors (see below), whose sum is σ = 175630896. Its totient is φ = 41816840.

The previous prime is 91997083. The next prime is 91997099. The reversal of 91997092 is 29079919.

It is not an unprimeable number, because it can be changed into a prime (91997099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045378 + ... + 1045465.

It is an arithmetic number, because the mean of its divisors is an integer number (14635908).

Almost surely, 2^91997092 is an apocalyptic number.

It is an amenable number.

91997092 is a deficient number, since it is larger than the sum of its proper divisors (83633804).

91997092 is a wasteful number, since it uses less digits than its factorization.

91997092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090858 (or 2090856 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 91997092 is about 9591.5114554485. The cubic root of 91997092 is about 451.4309870656.

The spelling of 91997092 in words is "ninety-one million, nine hundred ninety-seven thousand, ninety-two".