689950401 has 32 divisors (see below), whose sum is σ = 1109145600. Its totient is φ = 372677760.

The previous prime is 689950379. The next prime is 689950411. The reversal of 689950401 is 104059986.

It is not a de Polignac number, because 689950401 - 2⁷ = 689950273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (689950411) 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, 206220 + ... + 209538.

It is an arithmetic number, because the mean of its divisors is an integer number (34660800).

Almost surely, 2^689950401 is an apocalyptic number.

It is an amenable number.

689950401 is a deficient number, since it is larger than the sum of its proper divisors (419195199).

689950401 is a wasteful number, since it uses less digits than its factorization.

689950401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 689950401 is about 26266.9069553307. The cubic root of 689950401 is about 883.6344185766.

The spelling of 689950401 in words is "six hundred eighty-nine million, nine hundred fifty thousand, four hundred one".