690013279 has 4 divisors (see below), whose sum is σ = 698326776. Its totient is φ = 681699784.

The previous prime is 690013277. The next prime is 690013309. The reversal of 690013279 is 972310096.

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 690013279 - 2¹ = 690013277 is a prime.

It is a super-2 number, since 2×690013279² = 952236650392663682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690013277) 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, 4156624 + ... + 4156789.

It is an arithmetic number, because the mean of its divisors is an integer number (174581694).

Almost surely, 2^690013279 is an apocalyptic number.

690013279 is a deficient number, since it is larger than the sum of its proper divisors (8313497).

690013279 is an equidigital number, since it uses as much as digits as its factorization.

690013279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313496.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 690013279 is about 26268.1038333565. The cubic root of 690013279 is about 883.6612608333.

The spelling of 690013279 in words is "six hundred ninety million, thirteen thousand, two hundred seventy-nine".