15161987 has 2 divisors, whose sum is σ = 15161988. Its totient is φ = 15161986.

The previous prime is 15161969. The next prime is 15161989. The reversal of 15161987 is 78916151.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15161987 is a prime.

Together with 15161989, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15161987.

It is not a weakly prime, because it can be changed into another prime (15161989) 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, 7580993 + 7580994.

It is an arithmetic number, because the mean of its divisors is an integer number (7580994).

Almost surely, 2^15161987 is an apocalyptic number.

15161987 is a deficient number, since it is larger than the sum of its proper divisors (1).

15161987 is an equidigital number, since it uses as much as digits as its factorization.

15161987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 38.

The square root of 15161987 is about 3893.8396217615. The cubic root of 15161987 is about 247.5057958715.

The spelling of 15161987 in words is "fifteen million, one hundred sixty-one thousand, nine hundred eighty-seven".