159640903 has 8 divisors (see below), whose sum is σ = 165582720. Its totient is φ = 153784800.

The previous prime is 159640889. The next prime is 159640913. The reversal of 159640903 is 309046951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159640903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159640913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17623 + ... + 25096.

It is an arithmetic number, because the mean of its divisors is an integer number (20697840).

Almost surely, 2^159640903 is an apocalyptic number.

159640903 is a deficient number, since it is larger than the sum of its proper divisors (5941817).

159640903 is a wasteful number, since it uses less digits than its factorization.

159640903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42857.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 159640903 is about 12634.9081120521. The cubic root of 159640903 is about 542.4770777547.

The spelling of 159640903 in words is "one hundred fifty-nine million, six hundred forty thousand, nine hundred three".