690623423 has 4 divisors (see below), whose sum is σ = 789283920. Its totient is φ = 591962928.

The previous prime is 690623399. The next prime is 690623431. The reversal of 690623423 is 324326096.

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 690623423 - 2²² = 686429119 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 (690622423) 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, 49330238 + ... + 49330251.

It is an arithmetic number, because the mean of its divisors is an integer number (197320980).

Almost surely, 2^690623423 is an apocalyptic number.

690623423 is a deficient number, since it is larger than the sum of its proper divisors (98660497).

690623423 is an equidigital number, since it uses as much as digits as its factorization.

690623423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98660496.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 690623423 is about 26279.7150479224. The cubic root of 690623423 is about 883.9216431540.

The spelling of 690623423 in words is "six hundred ninety million, six hundred twenty-three thousand, four hundred twenty-three".