15279661 has 2 divisors, whose sum is σ = 15279662. Its totient is φ = 15279660.

The previous prime is 15279637. The next prime is 15279679. The reversal of 15279661 is 16697251.

15279661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10017225 + 5262436 = 3165^2 + 2294^2 .

It is a cyclic number.

It is not a de Polignac number, because 15279661 - 2¹³ = 15271469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15279661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15279601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7639830 + 7639831.

It is an arithmetic number, because the mean of its divisors is an integer number (7639831).

Almost surely, 2^15279661 is an apocalyptic number.

It is an amenable number.

15279661 is a deficient number, since it is larger than the sum of its proper divisors (1).

15279661 is an equidigital number, since it uses as much as digits as its factorization.

15279661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 15279661 is about 3908.9206950257. The cubic root of 15279661 is about 248.1444538675.

The spelling of 15279661 in words is "fifteen million, two hundred seventy-nine thousand, six hundred sixty-one".