90749501 has 4 divisors (see below), whose sum is σ = 91464192. Its totient is φ = 90034812.

The previous prime is 90749471. The next prime is 90749521. The reversal of 90749501 is 10594709.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10594709 = 73 ⋅145133.

It is a cyclic number.

It is not a de Polignac number, because 90749501 - 2⁶ = 90749437 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 (90749521) 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, 357155 + ... + 357408.

It is an arithmetic number, because the mean of its divisors is an integer number (22866048).

Almost surely, 2^90749501 is an apocalyptic number.

It is an amenable number.

90749501 is a deficient number, since it is larger than the sum of its proper divisors (714691).

90749501 is a wasteful number, since it uses less digits than its factorization.

90749501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714690.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 90749501 is about 9526.2532508852. The cubic root of 90749501 is about 449.3810436918.

The spelling of 90749501 in words is "ninety million, seven hundred forty-nine thousand, five hundred one".