15880087 has 2 divisors, whose sum is σ = 15880088. Its totient is φ = 15880086.

The previous prime is 15880061. The next prime is 15880093. The reversal of 15880087 is 78008851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15880087 - 2¹¹ = 15878039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15880037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7940043 + 7940044.

It is an arithmetic number, because the mean of its divisors is an integer number (7940044).

Almost surely, 2^15880087 is an apocalyptic number.

15880087 is a deficient number, since it is larger than the sum of its proper divisors (1).

15880087 is an equidigital number, since it uses as much as digits as its factorization.

15880087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 15880087 is about 3984.9826850314. The cubic root of 15880087 is about 251.3531269762.

The spelling of 15880087 in words is "fifteen million, eight hundred eighty thousand, eighty-seven".