15980897 has 2 divisors, whose sum is σ = 15980898. Its totient is φ = 15980896.

The previous prime is 15980891. The next prime is 15980933. The reversal of 15980897 is 79808951.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 3013696 = 3601^2 + 1736^2 .

It is an emirp because it is prime and its reverse (79808951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15980897 - 2¹² = 15976801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15980891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7990448 + 7990449.

It is an arithmetic number, because the mean of its divisors is an integer number (7990449).

Almost surely, 2^15980897 is an apocalyptic number.

It is an amenable number.

15980897 is a deficient number, since it is larger than the sum of its proper divisors (1).

15980897 is an equidigital number, since it uses as much as digits as its factorization.

15980897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 15980897 is about 3997.6114118308. The cubic root of 15980897 is about 251.8838855755.

The spelling of 15980897 in words is "fifteen million, nine hundred eighty thousand, eight hundred ninety-seven".