159657983 has 2 divisors, whose sum is σ = 159657984. Its totient is φ = 159657982.

The previous prime is 159657961. The next prime is 159657989. The reversal of 159657983 is 389756951.

It is a strong prime.

It is an emirp because it is prime and its reverse (389756951) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159657983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159657989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79828991 + 79828992.

It is an arithmetic number, because the mean of its divisors is an integer number (79828992).

Almost surely, 2^159657983 is an apocalyptic number.

159657983 is a deficient number, since it is larger than the sum of its proper divisors (1).

159657983 is an equidigital number, since it uses as much as digits as its factorization.

159657983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 53.

The square root of 159657983 is about 12635.5839991668. The cubic root of 159657983 is about 542.4964236281.

It can be divided in two parts, 15965 and 7983, that multiplied together give a triangular number (127448595 = T₁₅₉₆₅).

The spelling of 159657983 in words is "one hundred fifty-nine million, six hundred fifty-seven thousand, nine hundred eighty-three".