90909129 has 8 divisors (see below), whose sum is σ = 127591840. Its totient is φ = 57416256.

The previous prime is 90909127. The next prime is 90909157. The reversal of 90909129 is 92190909.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90909129 - 2¹ = 90909127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90909121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797392 + ... + 797505.

It is an arithmetic number, because the mean of its divisors is an integer number (15948980).

Almost surely, 2^90909129 is an apocalyptic number.

It is an amenable number.

90909129 is a deficient number, since it is larger than the sum of its proper divisors (36682711).

90909129 is a wasteful number, since it uses less digits than its factorization.

90909129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594919.

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 90909129 is about 9534.6278899598. The cubic root of 90909129 is about 449.6443758229.

The spelling of 90909129 in words is "ninety million, nine hundred nine thousand, one hundred twenty-nine".