90412551 has 8 divisors (see below), whose sum is σ = 133944560. Its totient is φ = 60275016.

The previous prime is 90412529. The next prime is 90412627. The reversal of 90412551 is 15521409.

It is not a de Polignac number, because 90412551 - 2¹⁰ = 90411527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3348613 = 90412551 / (9 + 0 + 4 + 1 + 2 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90419551) 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 7 ways as a sum of consecutive naturals, for example, 1674280 + ... + 1674333.

It is an arithmetic number, because the mean of its divisors is an integer number (16743070).

Almost surely, 2^90412551 is an apocalyptic number.

90412551 is a deficient number, since it is larger than the sum of its proper divisors (43532009).

90412551 is a wasteful number, since it uses less digits than its factorization.

90412551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348622 (or 3348616 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 90412551 is about 9508.5514669691. The cubic root of 90412551 is about 448.8241747537.

The spelling of 90412551 in words is "ninety million, four hundred twelve thousand, five hundred fifty-one".