385525639 has 2 divisors, whose sum is σ = 385525640. Its totient is φ = 385525638.

The previous prime is 385525633. The next prime is 385525687. The reversal of 385525639 is 936525583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385525639 - 2¹⁷ = 385394567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385525633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192762819 + 192762820.

It is an arithmetic number, because the mean of its divisors is an integer number (192762820).

Almost surely, 2^385525639 is an apocalyptic number.

385525639 is a deficient number, since it is larger than the sum of its proper divisors (1).

385525639 is an equidigital number, since it uses as much as digits as its factorization.

385525639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 46.

The square root of 385525639 is about 19634.8068235977. The cubic root of 385525639 is about 727.8095589037.

The spelling of 385525639 in words is "three hundred eighty-five million, five hundred twenty-five thousand, six hundred thirty-nine".