690965 has 16 divisors (see below), whose sum is σ = 959040. Its totient is φ = 472320.

The previous prime is 690953. The next prime is 690997. The reversal of 690965 is 569096.

It is a de Polignac number, because none of the positive numbers 2^k-690965 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566 + ... + 1304.

It is an arithmetic number, because the mean of its divisors is an integer number (59940).

2⁶⁹⁰⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

690965 is a deficient number, since it is larger than the sum of its proper divisors (268075).

690965 is a wasteful number, since it uses less digits than its factorization.

690965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 690965 is about 831.2430450837. The cubic root of 690965 is about 88.4067346070.

The spelling of 690965 in words is "six hundred ninety thousand, nine hundred sixty-five".