690402373 has 4 divisors (see below), whose sum is σ = 726739360. Its totient is φ = 654065388.

The previous prime is 690402343. The next prime is 690402397. The reversal of 690402373 is 373204096.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 690402373 - 2⁹ = 690401861 is a prime.

It is a super-2 number, since 2×690402373² = 953310873288062258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690402343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18168465 + ... + 18168502.

It is an arithmetic number, because the mean of its divisors is an integer number (181684840).

Almost surely, 2^690402373 is an apocalyptic number.

It is an amenable number.

690402373 is a deficient number, since it is larger than the sum of its proper divisors (36336987).

690402373 is a wasteful number, since it uses less digits than its factorization.

690402373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36336986.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 690402373 is about 26275.5089960214. The cubic root of 690402373 is about 883.8273265685.

It can be divided in two parts, 6904023 and 73, that added together give a palindrome (6904096).

The spelling of 690402373 in words is "six hundred ninety million, four hundred two thousand, three hundred seventy-three".