157127489 has 2 divisors, whose sum is σ = 157127490. Its totient is φ = 157127488.

The previous prime is 157127483. The next prime is 157127491. The reversal of 157127489 is 984721751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151486864 + 5640625 = 12308^2 + 2375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157127489 is a prime.

Together with 157127491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157127483) 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, 78563744 + 78563745.

It is an arithmetic number, because the mean of its divisors is an integer number (78563745).

Almost surely, 2^157127489 is an apocalyptic number.

It is an amenable number.

157127489 is a deficient number, since it is larger than the sum of its proper divisors (1).

157127489 is an equidigital number, since it uses as much as digits as its factorization.

157127489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 44.

The square root of 157127489 is about 12535.0504187259. The cubic root of 157127489 is about 539.6150537261.

The spelling of 157127489 in words is "one hundred fifty-seven million, one hundred twenty-seven thousand, four hundred eighty-nine".