1565380087 has 2 divisors, whose sum is σ = 1565380088. Its totient is φ = 1565380086.

The previous prime is 1565380081. The next prime is 1565380121. The reversal of 1565380087 is 7800835651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1565380087 - 2³ = 1565380079 is a prime.

It is a super-2 number, since 2×1565380087² = 4900829633552255138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1565380081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782690043 + 782690044.

It is an arithmetic number, because the mean of its divisors is an integer number (782690044).

Almost surely, 2^1565380087 is an apocalyptic number.

1565380087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1565380087 is an equidigital number, since it uses as much as digits as its factorization.

1565380087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1565380087 is about 39564.8845189772. The cubic root of 1565380087 is about 1161.1097403713.

The spelling of 1565380087 in words is "one billion, five hundred sixty-five million, three hundred eighty thousand, eighty-seven".