157318489 has 2 divisors, whose sum is σ = 157318490. Its totient is φ = 157318488.

The previous prime is 157318453. The next prime is 157318529. The reversal of 157318489 is 984813751.

It is a happy number.

157318489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101666889 + 55651600 = 10083^2 + 7460^2 .

It is a cyclic number.

It is not a de Polignac number, because 157318489 - 2¹¹ = 157316441 is a prime.

It is not a weakly prime, because it can be changed into another prime (157318409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78659244 + 78659245.

It is an arithmetic number, because the mean of its divisors is an integer number (78659245).

Almost surely, 2^157318489 is an apocalyptic number.

It is an amenable number.

157318489 is a deficient number, since it is larger than the sum of its proper divisors (1).

157318489 is an equidigital number, since it uses as much as digits as its factorization.

157318489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 157318489 is about 12542.6667419652. Note that the first 3 decimals coincide. The cubic root of 157318489 is about 539.8336124316.

The spelling of 157318489 in words is "one hundred fifty-seven million, three hundred eighteen thousand, four hundred eighty-nine".