385631539 has 2 divisors, whose sum is σ = 385631540. Its totient is φ = 385631538.

The previous prime is 385631513. The next prime is 385631579. The reversal of 385631539 is 935136583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385631539 - 2⁵ = 385631507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 385631495 and 385631504.

It is not a weakly prime, because it can be changed into another prime (385631509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192815769 + 192815770.

It is an arithmetic number, because the mean of its divisors is an integer number (192815770).

Almost surely, 2^385631539 is an apocalyptic number.

385631539 is a deficient number, since it is larger than the sum of its proper divisors (1).

385631539 is an equidigital number, since it uses as much as digits as its factorization.

385631539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 43.

The square root of 385631539 is about 19637.5033800124. The cubic root of 385631539 is about 727.8761934482.

The spelling of 385631539 in words is "three hundred eighty-five million, six hundred thirty-one thousand, five hundred thirty-nine".