157055389 has 2 divisors, whose sum is σ = 157055390. Its totient is φ = 157055388.

The previous prime is 157055359. The next prime is 157055407. The reversal of 157055389 is 983550751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122832889 + 34222500 = 11083^2 + 5850^2 .

It is a cyclic number.

It is not a de Polignac number, because 157055389 - 2⁵ = 157055357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157055309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78527694 + 78527695.

It is an arithmetic number, because the mean of its divisors is an integer number (78527695).

Almost surely, 2^157055389 is an apocalyptic number.

It is an amenable number.

157055389 is a deficient number, since it is larger than the sum of its proper divisors (1).

157055389 is an equidigital number, since it uses as much as digits as its factorization.

157055389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 43.

The square root of 157055389 is about 12532.1741529553. The cubic root of 157055389 is about 539.5325046274.

The spelling of 157055389 in words is "one hundred fifty-seven million, fifty-five thousand, three hundred eighty-nine".