159890623 has 2 divisors, whose sum is σ = 159890624. Its totient is φ = 159890622.

The previous prime is 159890603. The next prime is 159890639. The reversal of 159890623 is 326098951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159890623 is a prime.

It is a super-2 number, since 2×159890623² = 51130022646656258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 159890623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159890603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79945311 + 79945312.

It is an arithmetic number, because the mean of its divisors is an integer number (79945312).

Almost surely, 2^159890623 is an apocalyptic number.

159890623 is a deficient number, since it is larger than the sum of its proper divisors (1).

159890623 is an equidigital number, since it uses as much as digits as its factorization.

159890623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 159890623 is about 12644.7863959815. The cubic root of 159890623 is about 542.7597889296.

The spelling of 159890623 in words is "one hundred fifty-nine million, eight hundred ninety thousand, six hundred twenty-three".