90437423 has 4 divisors (see below), whose sum is σ = 90942840. Its totient is φ = 89932008.

The previous prime is 90437411. The next prime is 90437483. The reversal of 90437423 is 32473409.

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

It is a cyclic number.

It is not a de Polignac number, because 90437423 - 2¹² = 90433327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90437423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90437483) 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, 252440 + ... + 252797.

It is an arithmetic number, because the mean of its divisors is an integer number (22735710).

Almost surely, 2^90437423 is an apocalyptic number.

90437423 is a deficient number, since it is larger than the sum of its proper divisors (505417).

90437423 is a wasteful number, since it uses less digits than its factorization.

90437423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505416.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 90437423 is about 9509.8592523759. The cubic root of 90437423 is about 448.8653273418.

The spelling of 90437423 in words is "ninety million, four hundred thirty-seven thousand, four hundred twenty-three".