690634 has 8 divisors (see below), whose sum is σ = 1183968. Its totient is φ = 295980.

The previous prime is 690629. The next prime is 690661. The reversal of 690634 is 436096.

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

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24652 + ... + 24679.

It is an arithmetic number, because the mean of its divisors is an integer number (147996).

2⁶⁹⁰⁶³⁴ is an apocalyptic number.

690634 is a deficient number, since it is larger than the sum of its proper divisors (493334).

690634 is a wasteful number, since it uses less digits than its factorization.

690634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49340.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 690634 is about 831.0439218236. The cubic root of 690634 is about 88.3926155595.

The spelling of 690634 in words is "six hundred ninety thousand, six hundred thirty-four".