15198397 has 4 divisors (see below), whose sum is σ = 15208000. Its totient is φ = 15188796.

The previous prime is 15198329. The next prime is 15198419. The reversal of 15198397 is 79389151.

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.

It is a cyclic number.

It is not a de Polignac number, because 15198397 - 2⁷ = 15198269 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 (15198097) 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, 1803 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (3802000).

Almost surely, 2^15198397 is an apocalyptic number.

It is an amenable number.

15198397 is a deficient number, since it is larger than the sum of its proper divisors (9603).

15198397 is an equidigital number, since it uses as much as digits as its factorization.

15198397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9602.

The product of its digits is 68040, while the sum is 43.

The square root of 15198397 is about 3898.5121520908. The cubic root of 15198397 is about 247.7037576576.

The spelling of 15198397 in words is "fifteen million, one hundred ninety-eight thousand, three hundred ninety-seven".