157726769 has 2 divisors, whose sum is σ = 157726770. Its totient is φ = 157726768.

The previous prime is 157726757. The next prime is 157726817. The reversal of 157726769 is 967627751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153462544 + 4264225 = 12388^2 + 2065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157726769 is a prime.

It is a super-2 number, since 2×157726769² = 49755467318358722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157726069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78863384 + 78863385.

It is an arithmetic number, because the mean of its divisors is an integer number (78863385).

Almost surely, 2^157726769 is an apocalyptic number.

It is an amenable number.

157726769 is a deficient number, since it is larger than the sum of its proper divisors (1).

157726769 is an equidigital number, since it uses as much as digits as its factorization.

157726769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 50.

The square root of 157726769 is about 12558.9318415222. The cubic root of 157726769 is about 540.3002091559.

The spelling of 157726769 in words is "one hundred fifty-seven million, seven hundred twenty-six thousand, seven hundred sixty-nine".