91983057 has 8 divisors (see below), whose sum is σ = 122777376. Its totient is φ = 61255392.

The previous prime is 91983011. The next prime is 91983061. The reversal of 91983057 is 75038919.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91983057 - 2¹¹ = 91981009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91983457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13348 + ... + 19029.

It is an arithmetic number, because the mean of its divisors is an integer number (15347172).

Almost surely, 2^91983057 is an apocalyptic number.

It is an amenable number.

91983057 is a deficient number, since it is larger than the sum of its proper divisors (30794319).

91983057 is a wasteful number, since it uses less digits than its factorization.

91983057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33327.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 91983057 is about 9590.7797910285. The cubic root of 91983057 is about 451.4080292525.

The spelling of 91983057 in words is "ninety-one million, nine hundred eighty-three thousand, fifty-seven".