157279081 has 2 divisors, whose sum is σ = 157279082. Its totient is φ = 157279080.

The previous prime is 157279069. The next prime is 157279099. The reversal of 157279081 is 180972751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146023056 + 11256025 = 12084^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 157279081 - 2⁵ = 157279049 is a prime.

It is a super-2 number, since 2×157279081² = 49473418640409122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157279021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78639540 + 78639541.

It is an arithmetic number, because the mean of its divisors is an integer number (78639541).

Almost surely, 2^157279081 is an apocalyptic number.

It is an amenable number.

157279081 is a deficient number, since it is larger than the sum of its proper divisors (1).

157279081 is an equidigital number, since it uses as much as digits as its factorization.

157279081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 157279081 is about 12541.0956857844. The cubic root of 157279081 is about 539.7885328827.

The spelling of 157279081 in words is "one hundred fifty-seven million, two hundred seventy-nine thousand, eighty-one".