15139097 has 4 divisors (see below), whose sum is σ = 15146880. Its totient is φ = 15131316.

The previous prime is 15139087. The next prime is 15139121. The reversal of 15139097 is 79093151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79093151 = 47 ⋅1682833.

It is a cyclic number.

It is not a de Polignac number, because 15139097 - 2¹⁶ = 15073561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15139087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1904 + ... + 5822.

It is an arithmetic number, because the mean of its divisors is an integer number (3786720).

Almost surely, 2^15139097 is an apocalyptic number.

It is an amenable number.

15139097 is a deficient number, since it is larger than the sum of its proper divisors (7783).

15139097 is an equidigital number, since it uses as much as digits as its factorization.

15139097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 15139097 is about 3890.8992533860. The cubic root of 15139097 is about 247.3811802549.

The spelling of 15139097 in words is "fifteen million, one hundred thirty-nine thousand, ninety-seven".