387249137 has 32 divisors (see below), whose sum is σ = 470292480. Its totient is φ = 314533120.

The previous prime is 387249133. The next prime is 387249143. The reversal of 387249137 is 731942783.

It is not a de Polignac number, because 387249137 - 2² = 387249133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387249131) 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 31 ways as a sum of consecutive naturals, for example, 769628 + ... + 770130.

It is an arithmetic number, because the mean of its divisors is an integer number (14696640).

Almost surely, 2^387249137 is an apocalyptic number.

It is an amenable number.

387249137 is a deficient number, since it is larger than the sum of its proper divisors (83043343).

387249137 is a wasteful number, since it uses less digits than its factorization.

387249137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its digits is 254016, while the sum is 44.

The square root of 387249137 is about 19678.6467268458. The cubic root of 387249137 is about 728.8925078114.

The spelling of 387249137 in words is "three hundred eighty-seven million, two hundred forty-nine thousand, one hundred thirty-seven".