690379 has 4 divisors (see below), whose sum is σ = 693576. Its totient is φ = 687184.

The previous prime is 690377. The next prime is 690397. The reversal of 690379 is 973096.

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 690379 - 2¹ = 690377 is a prime.

It is a Duffinian number.

690379 is a lucky number.

It is a nialpdrome in base 15.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (690377) 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, 1249 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (173394).

2⁶⁹⁰³⁷⁹ is an apocalyptic number.

690379 is a deficient number, since it is larger than the sum of its proper divisors (3197).

690379 is a wasteful number, since it uses less digits than its factorization.

690379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 690379 is about 830.8904861653. The cubic root of 690379 is about 88.3817352709.

The spelling of 690379 in words is "six hundred ninety thousand, three hundred seventy-nine".