159943797 has 24 divisors (see below), whose sum is σ = 250304600. Its totient is φ = 98414784.

The previous prime is 159943793. The next prime is 159943799. The reversal of 159943797 is 797349951.

It is a happy number.

159943797 is a `hidden beast` number, since 1 + 599 + 43 + 7 + 9 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 101787921 + 58155876 = 10089^2 + 7626^2 .

It is not a de Polignac number, because 159943797 - 2² = 159943793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159943793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15729 + ... + 23817.

Almost surely, 2^159943797 is an apocalyptic number.

It is an amenable number.

159943797 is a deficient number, since it is larger than the sum of its proper divisors (90360803).

159943797 is an equidigital number, since it uses as much as digits as its factorization.

159943797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8134 (or 8105 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 159943797 is about 12646.8888269013. Note that the first 4 decimals coincide. The cubic root of 159943797 is about 542.8199498691.

It can be divided in two parts, 15994 and 3797, that added together give a palindrome (19791).

The spelling of 159943797 in words is "one hundred fifty-nine million, nine hundred forty-three thousand, seven hundred ninety-seven".