690259969 has 32 divisors (see below), whose sum is σ = 859590144. Its totient is φ = 541432320.

The previous prime is 690259967. The next prime is 690259991. The reversal of 690259969 is 969952096.

It is a cyclic number.

It is not a de Polignac number, because 690259969 - 2¹ = 690259967 is a prime.

It is a super-2 number, since 2×690259969² = 952917649607761922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690259967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348867 + ... + 350839.

It is an arithmetic number, because the mean of its divisors is an integer number (26862192).

Almost surely, 2^690259969 is an apocalyptic number.

It is an amenable number.

690259969 is a deficient number, since it is larger than the sum of its proper divisors (169330175).

690259969 is a wasteful number, since it uses less digits than its factorization.

690259969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 690259969 is about 26272.7990324594. The cubic root of 690259969 is about 883.7665556297.

The spelling of 690259969 in words is "six hundred ninety million, two hundred fifty-nine thousand, nine hundred sixty-nine".