157196489 has 2 divisors, whose sum is σ = 157196490. Its totient is φ = 157196488.

The previous prime is 157196471. The next prime is 157196497. The reversal of 157196489 is 984691751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123032464 + 34164025 = 11092^2 + 5845^2 .

It is an emirp because it is prime and its reverse (984691751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157196489 - 2⁸ = 157196233 is a prime.

It is not a weakly prime, because it can be changed into another prime (157196449) 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, 78598244 + 78598245.

It is an arithmetic number, because the mean of its divisors is an integer number (78598245).

Almost surely, 2^157196489 is an apocalyptic number.

It is an amenable number.

157196489 is a deficient number, since it is larger than the sum of its proper divisors (1).

157196489 is an equidigital number, since it uses as much as digits as its factorization.

157196489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 157196489 is about 12537.8023991448. The cubic root of 157196489 is about 539.6940299131.

The spelling of 157196489 in words is "one hundred fifty-seven million, one hundred ninety-six thousand, four hundred eighty-nine".