15874897 has 2 divisors, whose sum is σ = 15874898. Its totient is φ = 15874896.

The previous prime is 15874867. The next prime is 15874921. The reversal of 15874897 is 79847851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12173121 + 3701776 = 3489^2 + 1924^2 .

It is an emirp because it is prime and its reverse (79847851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15874897 - 2⁷ = 15874769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15874897.

It is not a weakly prime, because it can be changed into another prime (15874867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7937448 + 7937449.

It is an arithmetic number, because the mean of its divisors is an integer number (7937449).

Almost surely, 2^15874897 is an apocalyptic number.

It is an amenable number.

15874897 is a deficient number, since it is larger than the sum of its proper divisors (1).

15874897 is an equidigital number, since it uses as much as digits as its factorization.

15874897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 15874897 is about 3984.3314370168. The cubic root of 15874897 is about 251.3257412137.

The spelling of 15874897 in words is "fifteen million, eight hundred seventy-four thousand, eight hundred ninety-seven".