90423939 has 8 divisors (see below), whose sum is σ = 120721600. Its totient is φ = 60204456.

The previous prime is 90423919. The next prime is 90423959. The reversal of 90423939 is 93932409.

It is an interprime number because it is at equal distance from previous prime (90423919) and next prime (90423959).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90423939 - 2⁹ = 90423427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90423897 and 90423906.

It is not an unprimeable number, because it can be changed into a prime (90423919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16789 + ... + 21510.

It is an arithmetic number, because the mean of its divisors is an integer number (15090200).

Almost surely, 2^90423939 is an apocalyptic number.

90423939 is a deficient number, since it is larger than the sum of its proper divisors (30297661).

90423939 is a wasteful number, since it uses less digits than its factorization.

90423939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39089.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 90423939 is about 9509.1502774959. The cubic root of 90423939 is about 448.8430179898.

The spelling of 90423939 in words is "ninety million, four hundred twenty-three thousand, nine hundred thirty-nine".