90732129 has 4 divisors (see below), whose sum is σ = 120976176. Its totient is φ = 60488084.

The previous prime is 90732101. The next prime is 90732199. The reversal of 90732129 is 92123709.

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 90732129 - 2⁷ = 90732001 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90732129.

It is not an unprimeable number, because it can be changed into a prime (90732199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15122019 + ... + 15122024.

It is an arithmetic number, because the mean of its divisors is an integer number (30244044).

Almost surely, 2^90732129 is an apocalyptic number.

It is an amenable number.

90732129 is a deficient number, since it is larger than the sum of its proper divisors (30244047).

90732129 is a wasteful number, since it uses less digits than its factorization.

90732129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30244046.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90732129 is about 9525.3414112041. The cubic root of 90732129 is about 449.3523671497.

The spelling of 90732129 in words is "ninety million, seven hundred thirty-two thousand, one hundred twenty-nine".