90751791 has 16 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 55707360.

The previous prime is 90751781. The next prime is 90751799. The reversal of 90751791 is 19715709.

It is not a de Polignac number, because 90751791 - 2¹⁰ = 90750767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90751799) 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, 14110 + ... + 19508.

It is an arithmetic number, because the mean of its divisors is an integer number (8164800).

Almost surely, 2^90751791 is an apocalyptic number.

90751791 is a deficient number, since it is larger than the sum of its proper divisors (39885009).

90751791 is a wasteful number, since it uses less digits than its factorization.

90751791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5846.

The product of its (nonzero) digits is 19845, while the sum is 39.

The square root of 90751791 is about 9526.3734442861. The cubic root of 90751791 is about 449.3848235985.

The spelling of 90751791 in words is "ninety million, seven hundred fifty-one thousand, seven hundred ninety-one".