690079 has 8 divisors (see below), whose sum is σ = 751520. Its totient is φ = 629856.

The previous prime is 690073. The next prime is 690089. The reversal of 690079 is 970096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 9-Lehmer number, since φ(690079) divides (690079-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 690079 - 2⁷ = 689951 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 690079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174 + ... + 1660.

It is an arithmetic number, because the mean of its divisors is an integer number (93940).

2⁶⁹⁰⁰⁷⁹ is an apocalyptic number.

690079 is a deficient number, since it is larger than the sum of its proper divisors (61441).

690079 is a wasteful number, since it uses less digits than its factorization.

690079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 690079 is about 830.7099373428. The cubic root of 690079 is about 88.3689315007.

The spelling of 690079 in words is "six hundred ninety thousand, seventy-nine".