690527923 has 4 divisors (see below), whose sum is σ = 692019808. Its totient is φ = 689036040.

The previous prime is 690527911. The next prime is 690527941. The reversal of 690527923 is 329725096.

690527923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-690527923 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 690527923.

It is not an unprimeable number, because it can be changed into a prime (690527423) 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, 745248 + ... + 746173.

It is an arithmetic number, because the mean of its divisors is an integer number (173004952).

Almost surely, 2^690527923 is an apocalyptic number.

690527923 is a deficient number, since it is larger than the sum of its proper divisors (1491885).

690527923 is a wasteful number, since it uses less digits than its factorization.

690527923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491884.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 690527923 is about 26277.8979943221. The cubic root of 690527923 is about 883.8808981279.

The spelling of 690527923 in words is "six hundred ninety million, five hundred twenty-seven thousand, nine hundred twenty-three".