90123854 has 4 divisors (see below), whose sum is σ = 135185784. Its totient is φ = 45061926.

The previous prime is 90123833. The next prime is 90123893. The reversal of 90123854 is 45832109.

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 90123854.

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, 22530962 + ... + 22530965.

It is an arithmetic number, because the mean of its divisors is an integer number (33796446).

Almost surely, 2^90123854 is an apocalyptic number.

90123854 is a deficient number, since it is larger than the sum of its proper divisors (45061930).

90123854 is a wasteful number, since it uses less digits than its factorization.

90123854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45061929.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 90123854 is about 9493.3584152290. The cubic root of 90123854 is about 448.3459507634.

The spelling of 90123854 in words is "ninety million, one hundred twenty-three thousand, eight hundred fifty-four".