90123412 has 12 divisors (see below), whose sum is σ = 161562996. Its totient is φ = 43962560.

The previous prime is 90123401. The next prime is 90123421. The reversal of 90123412 is 21432109.

It can be written as a sum of positive squares in 2 ways, for example, as 18957316 + 71166096 = 4354^2 + 8436^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274603 + ... + 274930.

It is an arithmetic number, because the mean of its divisors is an integer number (13463583).

Almost surely, 2^90123412 is an apocalyptic number.

It is an amenable number.

90123412 is a deficient number, since it is larger than the sum of its proper divisors (71439584).

90123412 is a wasteful number, since it uses less digits than its factorization.

90123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549578 (or 549576 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 90123412 is about 9493.3351357676. The cubic root of 90123412 is about 448.3452178120.

The spelling of 90123412 in words is "ninety million, one hundred twenty-three thousand, four hundred twelve".