90123646 has 4 divisors (see below), whose sum is σ = 135185472. Its totient is φ = 45061822.

The previous prime is 90123629. The next prime is 90123653. The reversal of 90123646 is 64632109.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22530910 + ... + 22530913.

It is an arithmetic number, because the mean of its divisors is an integer number (33796368).

Almost surely, 2^90123646 is an apocalyptic number.

90123646 is a deficient number, since it is larger than the sum of its proper divisors (45061826).

90123646 is a wasteful number, since it uses less digits than its factorization.

90123646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45061825.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 90123646 is about 9493.3474601955. The cubic root of 90123646 is about 448.3456058454.

The spelling of 90123646 in words is "ninety million, one hundred twenty-three thousand, six hundred forty-six".