91993083 has 32 divisors (see below), whose sum is σ = 151581696. Its totient is φ = 48325248.

The previous prime is 91993073. The next prime is 91993087. The reversal of 91993083 is 38039919.

It is a happy number.

It is not a de Polignac number, because 91993083 - 2⁶ = 91993019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91993087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86010 + ... + 87072.

It is an arithmetic number, because the mean of its divisors is an integer number (4736928).

Almost surely, 2^91993083 is an apocalyptic number.

91993083 is a deficient number, since it is larger than the sum of its proper divisors (59588613).

91993083 is a wasteful number, since it uses less digits than its factorization.

91993083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 91993083 is about 9591.3024662973. The cubic root of 91993083 is about 451.4244295644.

The spelling of 91993083 in words is "ninety-one million, nine hundred ninety-three thousand, eighty-three".