389578157 has 2 divisors, whose sum is σ = 389578158. Its totient is φ = 389578156.

The previous prime is 389578153. The next prime is 389578177. The reversal of 389578157 is 751875983.

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., 375545641 + 14032516 = 19379^2 + 3746^2 .

It is a cyclic number.

It is not a de Polignac number, because 389578157 - 2² = 389578153 is a prime.

It is a super-2 number, since 2×389578157² = 303542280823033298, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 389578099 and 389578108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389578153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194789078 + 194789079.

It is an arithmetic number, because the mean of its divisors is an integer number (194789079).

Almost surely, 2^389578157 is an apocalyptic number.

It is an amenable number.

389578157 is a deficient number, since it is larger than the sum of its proper divisors (1).

389578157 is an equidigital number, since it uses as much as digits as its factorization.

389578157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 53.

The square root of 389578157 is about 19737.7343431307. The cubic root of 389578157 is about 730.3508396779.

The spelling of 389578157 in words is "three hundred eighty-nine million, five hundred seventy-eight thousand, one hundred fifty-seven".