15479887 has 2 divisors, whose sum is σ = 15479888. Its totient is φ = 15479886.

The previous prime is 15479879. The next prime is 15479899. The reversal of 15479887 is 78897451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15479887 - 2³ = 15479879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15479887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15479857) 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, 7739943 + 7739944.

It is an arithmetic number, because the mean of its divisors is an integer number (7739944).

Almost surely, 2^15479887 is an apocalyptic number.

15479887 is a deficient number, since it is larger than the sum of its proper divisors (1).

15479887 is an equidigital number, since it uses as much as digits as its factorization.

15479887 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 15479887 is about 3934.4487542730. The cubic root of 15479887 is about 249.2236556533.

The spelling of 15479887 in words is "fifteen million, four hundred seventy-nine thousand, eight hundred eighty-seven".