689501401 has 4 divisors (see below), whose sum is σ = 708136612. Its totient is φ = 670866192.

The previous prime is 689501389. The next prime is 689501413. The reversal of 689501401 is 104105986.

689501401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104105986 = 2 ⋅52052993.

It is an interprime number because it is at equal distance from previous prime (689501389) and next prime (689501413).

It can be written as a sum of positive squares in 2 ways, for example, as 403045776 + 286455625 = 20076^2 + 16925^2 .

It is a cyclic number.

It is not a de Polignac number, because 689501401 - 2⁷ = 689501273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689501201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9317550 + ... + 9317623.

It is an arithmetic number, because the mean of its divisors is an integer number (177034153).

Almost surely, 2^689501401 is an apocalyptic number.

It is an amenable number.

689501401 is a deficient number, since it is larger than the sum of its proper divisors (18635211).

689501401 is a wasteful number, since it uses less digits than its factorization.

689501401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18635210.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 689501401 is about 26258.3586882349. The cubic root of 689501401 is about 883.4426956405.

The spelling of 689501401 in words is "six hundred eighty-nine million, five hundred one thousand, four hundred one".