15136994 has 4 divisors (see below), whose sum is σ = 22705494. Its totient is φ = 7568496.

The previous prime is 15136991. The next prime is 15136999. The reversal of 15136994 is 49963151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49963151 = 7 ⋅7137593.

It can be written as a sum of positive squares in only one way, i.e., 13213225 + 1923769 = 3635^2 + 1387^2 .

It is not an unprimeable number, because it can be changed into a prime (15136991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3784247 + ... + 3784250.

Almost surely, 2^15136994 is an apocalyptic number.

15136994 is a deficient number, since it is larger than the sum of its proper divisors (7568500).

15136994 is an equidigital number, since it uses as much as digits as its factorization.

15136994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568499.

The product of its digits is 29160, while the sum is 38.

The square root of 15136994 is about 3890.6289979899. The cubic root of 15136994 is about 247.3697249985.

The spelling of 15136994 in words is "fifteen million, one hundred thirty-six thousand, nine hundred ninety-four".