159138487 has 4 divisors (see below), whose sum is σ = 159184480. Its totient is φ = 159092496.

The previous prime is 159138481. The next prime is 159138503. The reversal of 159138487 is 784831951.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159138487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159138481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17343 + ... + 24880.

It is an arithmetic number, because the mean of its divisors is an integer number (39796120).

Almost surely, 2^159138487 is an apocalyptic number.

159138487 is a deficient number, since it is larger than the sum of its proper divisors (45993).

159138487 is an equidigital number, since it uses as much as digits as its factorization.

159138487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45992.

The product of its digits is 241920, while the sum is 46.

The square root of 159138487 is about 12615.0103844587. The cubic root of 159138487 is about 541.9073917110.

The spelling of 159138487 in words is "one hundred fifty-nine million, one hundred thirty-eight thousand, four hundred eighty-seven".