15487897 has 2 divisors, whose sum is σ = 15487898. Its totient is φ = 15487896.

The previous prime is 15487889. The next prime is 15487903. The reversal of 15487897 is 79878451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14167696 + 1320201 = 3764^2 + 1149^2 .

It is a cyclic number.

It is not a de Polignac number, because 15487897 - 2³ = 15487889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15487897.

It is not a weakly prime, because it can be changed into another prime (15487097) 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, 7743948 + 7743949.

It is an arithmetic number, because the mean of its divisors is an integer number (7743949).

Almost surely, 2^15487897 is an apocalyptic number.

It is an amenable number.

15487897 is a deficient number, since it is larger than the sum of its proper divisors (1).

15487897 is an equidigital number, since it uses as much as digits as its factorization.

15487897 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 15487897 is about 3935.4665542982. The cubic root of 15487897 is about 249.2666348055.

It can be divided in two parts, 15487 and 897, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 15487897 in words is "fifteen million, four hundred eighty-seven thousand, eight hundred ninety-seven".