91799457 has 16 divisors (see below), whose sum is σ = 124946880. Its totient is φ = 59933952.

The previous prime is 91799419. The next prime is 91799467. The reversal of 91799457 is 75499719.

It is a happy number.

It is not a de Polignac number, because 91799457 - 2¹⁰ = 91798433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91799467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54573 + ... + 56229.

It is an arithmetic number, because the mean of its divisors is an integer number (7809180).

Almost surely, 2^91799457 is an apocalyptic number.

It is an amenable number.

91799457 is a deficient number, since it is larger than the sum of its proper divisors (33147423).

91799457 is a wasteful number, since it uses less digits than its factorization.

91799457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032.

The product of its digits is 714420, while the sum is 51.

The square root of 91799457 is about 9581.2033169117. The cubic root of 91799457 is about 451.1074894195.

The spelling of 91799457 in words is "ninety-one million, seven hundred ninety-nine thousand, four hundred fifty-seven".