91977103 has 4 divisors (see below), whose sum is σ = 91997280. Its totient is φ = 91956928.

The previous prime is 91977097. The next prime is 91977113. The reversal of 91977103 is 30177919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30177919 = 643 ⋅46933.

It is a cyclic number.

It is not a de Polignac number, because 91977103 - 2¹⁷ = 91846031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91977113) 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, 351 + ... + 13567.

It is an arithmetic number, because the mean of its divisors is an integer number (22999320).

Almost surely, 2^91977103 is an apocalyptic number.

91977103 is a deficient number, since it is larger than the sum of its proper divisors (20177).

91977103 is a wasteful number, since it uses less digits than its factorization.

91977103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20176.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 91977103 is about 9590.4693837163. The cubic root of 91977103 is about 451.3982892653.

The spelling of 91977103 in words is "ninety-one million, nine hundred seventy-seven thousand, one hundred three".