159420497 has 2 divisors, whose sum is σ = 159420498. Its totient is φ = 159420496.

The previous prime is 159420493. The next prime is 159420529. The reversal of 159420497 is 794024951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127599616 + 31820881 = 11296^2 + 5641^2 .

It is an emirp because it is prime and its reverse (794024951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159420497 - 2² = 159420493 is a prime.

It is not a weakly prime, because it can be changed into another prime (159420493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79710248 + 79710249.

It is an arithmetic number, because the mean of its divisors is an integer number (79710249).

Almost surely, 2^159420497 is an apocalyptic number.

It is an amenable number.

159420497 is a deficient number, since it is larger than the sum of its proper divisors (1).

159420497 is an equidigital number, since it uses as much as digits as its factorization.

159420497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 159420497 is about 12626.1829940802. The cubic root of 159420497 is about 542.2273082864.

The spelling of 159420497 in words is "one hundred fifty-nine million, four hundred twenty thousand, four hundred ninety-seven".