15401689 has 2 divisors, whose sum is σ = 15401690. Its totient is φ = 15401688.

The previous prime is 15401681. The next prime is 15401777. The reversal of 15401689 is 98610451.

15401689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 2152089 = 3640^2 + 1467^2 .

It is a cyclic number.

It is not a de Polignac number, because 15401689 - 2³ = 15401681 is a prime.

It is not a weakly prime, because it can be changed into another prime (15401681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7700844 + 7700845.

It is an arithmetic number, because the mean of its divisors is an integer number (7700845).

Almost surely, 2^15401689 is an apocalyptic number.

It is an amenable number.

15401689 is a deficient number, since it is larger than the sum of its proper divisors (1).

15401689 is an equidigital number, since it uses as much as digits as its factorization.

15401689 is an evil number, because the sum of its binary digits is even.

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

The square root of 15401689 is about 3924.4985666961. The cubic root of 15401689 is about 248.8032886684.

The spelling of 15401689 in words is "fifteen million, four hundred one thousand, six hundred eighty-nine".