90129237 has 8 divisors (see below), whose sum is σ = 131097120. Its totient is φ = 54623760.

The previous prime is 90129229. The next prime is 90129239. The reversal of 90129237 is 73292109.

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

It is not a de Polignac number, because 90129237 - 2³ = 90129229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2731189 = 90129237 / (9 + 0 + 1 + 2 + 9 + 2 + 3 + 7).

It is a junction number, because it is equal to n+sod(n) for n = 90129198 and 90129207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90129239) 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, 1365562 + ... + 1365627.

It is an arithmetic number, because the mean of its divisors is an integer number (16387140).

Almost surely, 2^90129237 is an apocalyptic number.

It is an amenable number.

90129237 is a deficient number, since it is larger than the sum of its proper divisors (40967883).

90129237 is a wasteful number, since it uses less digits than its factorization.

90129237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731203.

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

The square root of 90129237 is about 9493.6419249938. The cubic root of 90129237 is about 448.3548769914.

The spelling of 90129237 in words is "ninety million, one hundred twenty-nine thousand, two hundred thirty-seven".