90411923 has 4 divisors (see below), whose sum is σ = 103327920. Its totient is φ = 77495928.

The previous prime is 90411913. The next prime is 90411931. The reversal of 90411923 is 32911409.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32911409 = 83 ⋅396523.

It is a cyclic number.

It is not a de Polignac number, because 90411923 - 2⁴ = 90411907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90411913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6457988 + ... + 6458001.

It is an arithmetic number, because the mean of its divisors is an integer number (25831980).

Almost surely, 2^90411923 is an apocalyptic number.

90411923 is a deficient number, since it is larger than the sum of its proper divisors (12915997).

90411923 is a wasteful number, since it uses less digits than its factorization.

90411923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12915996.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 90411923 is about 9508.5184440059. The cubic root of 90411923 is about 448.8231355830.

The spelling of 90411923 in words is "ninety million, four hundred eleven thousand, nine hundred twenty-three".