157285789 has 2 divisors, whose sum is σ = 157285790. Its totient is φ = 157285788.

The previous prime is 157285771. The next prime is 157285813. The reversal of 157285789 is 987582751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141205689 + 16080100 = 11883^2 + 4010^2 .

It is a cyclic number.

It is not a de Polignac number, because 157285789 - 2²³ = 148897181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157285729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78642894 + 78642895.

It is an arithmetic number, because the mean of its divisors is an integer number (78642895).

Almost surely, 2^157285789 is an apocalyptic number.

It is an amenable number.

157285789 is a deficient number, since it is larger than the sum of its proper divisors (1).

157285789 is an equidigital number, since it uses as much as digits as its factorization.

157285789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 52.

The square root of 157285789 is about 12541.3631236800. The cubic root of 157285789 is about 539.7962068212.

The spelling of 157285789 in words is "one hundred fifty-seven million, two hundred eighty-five thousand, seven hundred eighty-nine".