15138693 has 12 divisors (see below), whose sum is σ = 22093708. Its totient is φ = 9987840.

The previous prime is 15138689. The next prime is 15138707. The reversal of 15138693 is 39683151.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10614564 + 4524129 = 3258^2 + 2127^2 .

It is not a de Polignac number, because 15138693 - 2² = 15138689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15138293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7798 + ... + 9543.

Almost surely, 2^15138693 is an apocalyptic number.

It is an amenable number.

15138693 is a deficient number, since it is larger than the sum of its proper divisors (6955015).

15138693 is a wasteful number, since it uses less digits than its factorization.

15138693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17444 (or 17441 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 15138693 is about 3890.8473370206. The cubic root of 15138693 is about 247.3789797078.

The spelling of 15138693 in words is "fifteen million, one hundred thirty-eight thousand, six hundred ninety-three".