159779491 has 2 divisors, whose sum is σ = 159779492. Its totient is φ = 159779490.

The previous prime is 159779441. The next prime is 159779497. The reversal of 159779491 is 194977951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159779491 - 2⁹ = 159778979 is a prime.

It is not a weakly prime, because it can be changed into another prime (159779497) 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 as a sum of consecutive naturals, namely, 79889745 + 79889746.

It is an arithmetic number, because the mean of its divisors is an integer number (79889746).

Almost surely, 2^159779491 is an apocalyptic number.

159779491 is a deficient number, since it is larger than the sum of its proper divisors (1).

159779491 is an equidigital number, since it uses as much as digits as its factorization.

159779491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 714420, while the sum is 52.

The square root of 159779491 is about 12640.3912518561. The cubic root of 159779491 is about 542.6340113620.

The spelling of 159779491 in words is "one hundred fifty-nine million, seven hundred seventy-nine thousand, four hundred ninety-one".