690969 has 8 divisors (see below), whose sum is σ = 928480. Its totient is φ = 457056.

The previous prime is 690953. The next prime is 690997. The reversal of 690969 is 969096.

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

It is not a de Polignac number, because 690969 - 2⁴ = 690953 is a prime.

It is a super-2 number, since 2×690969² = 954876317922, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690969.

It is not an unprimeable number, because it can be changed into a prime (690919) 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, 412 + ... + 1245.

It is an arithmetic number, because the mean of its divisors is an integer number (116060).

2⁶⁹⁰⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

690969 is a deficient number, since it is larger than the sum of its proper divisors (237511).

690969 is a wasteful number, since it uses less digits than its factorization.

690969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 690969 is about 831.2454511154. The cubic root of 690969 is about 88.4069052024.

The spelling of 690969 in words is "six hundred ninety thousand, nine hundred sixty-nine".