90799729 has 4 divisors (see below), whose sum is σ = 90830320. Its totient is φ = 90769140.

The previous prime is 90799711. The next prime is 90799741. The reversal of 90799729 is 92799709.

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.

It is a cyclic number.

It is not a de Polignac number, because 90799729 - 2⁵ = 90799697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90799799) 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, 10299 + ... + 16960.

It is an arithmetic number, because the mean of its divisors is an integer number (22707580).

Almost surely, 2^90799729 is an apocalyptic number.

It is an amenable number.

90799729 is a deficient number, since it is larger than the sum of its proper divisors (30591).

90799729 is a wasteful number, since it uses less digits than its factorization.

90799729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30590.

The product of its (nonzero) digits is 642978, while the sum is 52.

The square root of 90799729 is about 9528.8891797523. The cubic root of 90799729 is about 449.4639361515.

The spelling of 90799729 in words is "ninety million, seven hundred ninety-nine thousand, seven hundred twenty-nine".