387389539 has 2 divisors, whose sum is σ = 387389540. Its totient is φ = 387389538.

The previous prime is 387389531. The next prime is 387389543. The reversal of 387389539 is 935983783.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 387389539 - 2³ = 387389531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 387389539.

It is not a weakly prime, because it can be changed into another prime (387389531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193694769 + 193694770.

It is an arithmetic number, because the mean of its divisors is an integer number (193694770).

Almost surely, 2^387389539 is an apocalyptic number.

387389539 is a deficient number, since it is larger than the sum of its proper divisors (1).

387389539 is an equidigital number, since it uses as much as digits as its factorization.

387389539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 55.

The square root of 387389539 is about 19682.2137728458. The cubic root of 387389539 is about 728.9805868546.

The spelling of 387389539 in words is "three hundred eighty-seven million, three hundred eighty-nine thousand, five hundred thirty-nine".