890732423 has 4 divisors (see below), whose sum is σ = 1017979920. Its totient is φ = 763484928.

The previous prime is 890732389. The next prime is 890732443. The reversal of 890732423 is 324237098.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890732423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890732443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63623738 + ... + 63623751.

It is an arithmetic number, because the mean of its divisors is an integer number (254494980).

Almost surely, 2^890732423 is an apocalyptic number.

890732423 is a deficient number, since it is larger than the sum of its proper divisors (127247497).

890732423 is a wasteful number, since it uses less digits than its factorization.

890732423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127247496.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 890732423 is about 29845.1406932519. The cubic root of 890732423 is about 962.1639636067.

The spelling of 890732423 in words is "eight hundred ninety million, seven hundred thirty-two thousand, four hundred twenty-three".