387249339 has 4 divisors (see below), whose sum is σ = 516332456. Its totient is φ = 258166224.

The previous prime is 387249329. The next prime is 387249349. The reversal of 387249339 is 933942783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933942783 = 3 ⋅311314261.

It is an interprime number because it is at equal distance from previous prime (387249329) and next prime (387249349).

It is not a de Polignac number, because 387249339 - 2²⁵ = 353694907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387249329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64541554 + ... + 64541559.

It is an arithmetic number, because the mean of its divisors is an integer number (129083114).

Almost surely, 2^387249339 is an apocalyptic number.

387249339 is a deficient number, since it is larger than the sum of its proper divisors (129083117).

387249339 is a wasteful number, since it uses less digits than its factorization.

387249339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129083116.

The product of its digits is 979776, while the sum is 48.

The square root of 387249339 is about 19678.6518593119. The cubic root of 387249339 is about 728.8926345483.

The spelling of 387249339 in words is "three hundred eighty-seven million, two hundred forty-nine thousand, three hundred thirty-nine".