159252493 has 4 divisors (see below), whose sum is σ = 161434108. Its totient is φ = 157070880.

The previous prime is 159252469. The next prime is 159252557. The reversal of 159252493 is 394252951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394252951 = 4423 ⋅89137.

It can be written as a sum of positive squares in 2 ways, for example, as 118330884 + 40921609 = 10878^2 + 6397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159252493 is a prime.

It is a super-2 number, since 2×159252493² = 50722713053430098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159252463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090698 + ... + 1090843.

It is an arithmetic number, because the mean of its divisors is an integer number (40358527).

Almost surely, 2^159252493 is an apocalyptic number.

It is an amenable number.

159252493 is a deficient number, since it is larger than the sum of its proper divisors (2181615).

159252493 is an equidigital number, since it uses as much as digits as its factorization.

159252493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181614.

The product of its digits is 97200, while the sum is 40.

The square root of 159252493 is about 12619.5282399938. The cubic root of 159252493 is about 542.0367673845.

The spelling of 159252493 in words is "one hundred fifty-nine million, two hundred fifty-two thousand, four hundred ninety-three".