159874997 has 2 divisors, whose sum is σ = 159874998. Its totient is φ = 159874996.

The previous prime is 159874973. The next prime is 159875011. The reversal of 159874997 is 799478951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134884996 + 24990001 = 11614^2 + 4999^2 .

It is an emirp because it is prime and its reverse (799478951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159874997 - 2⁶ = 159874933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159874927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79937498 + 79937499.

It is an arithmetic number, because the mean of its divisors is an integer number (79937499).

Almost surely, 2^159874997 is an apocalyptic number.

It is an amenable number.

159874997 is a deficient number, since it is larger than the sum of its proper divisors (1).

159874997 is an equidigital number, since it uses as much as digits as its factorization.

159874997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 59.

The square root of 159874997 is about 12644.1684977700. The cubic root of 159874997 is about 542.7421071740.

The spelling of 159874997 in words is "one hundred fifty-nine million, eight hundred seventy-four thousand, nine hundred ninety-seven".