159191887 has 2 divisors, whose sum is σ = 159191888. Its totient is φ = 159191886.

The previous prime is 159191863. The next prime is 159191909. The reversal of 159191887 is 788191951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159191887 - 2¹⁹ = 158667599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159191887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159191387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79595943 + 79595944.

It is an arithmetic number, because the mean of its divisors is an integer number (79595944).

Almost surely, 2^159191887 is an apocalyptic number.

159191887 is a deficient number, since it is larger than the sum of its proper divisors (1).

159191887 is an equidigital number, since it uses as much as digits as its factorization.

159191887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 49.

The square root of 159191887 is about 12617.1267331354. The cubic root of 159191887 is about 541.9679985009.

The spelling of 159191887 in words is "one hundred fifty-nine million, one hundred ninety-one thousand, eight hundred eighty-seven".