15728693 has 2 divisors, whose sum is σ = 15728694. Its totient is φ = 15728692.

The previous prime is 15728681. The next prime is 15728717. The reversal of 15728693 is 39682751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13675204 + 2053489 = 3698^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 15728693 - 2¹⁶ = 15663157 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15728693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15728393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7864346 + 7864347.

It is an arithmetic number, because the mean of its divisors is an integer number (7864347).

Almost surely, 2^15728693 is an apocalyptic number.

It is an amenable number.

15728693 is a deficient number, since it is larger than the sum of its proper divisors (1).

15728693 is an equidigital number, since it uses as much as digits as its factorization.

15728693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 15728693 is about 3965.9416284156. The cubic root of 15728693 is about 250.5518104581.

The spelling of 15728693 in words is "fifteen million, seven hundred twenty-eight thousand, six hundred ninety-three".