387771725 has 18 divisors (see below), whose sum is σ = 528527370. Its totient is φ = 282013600.

The previous prime is 387771719. The next prime is 387771749. The reversal of 387771725 is 527177783.

It can be written as a sum of positive squares in 3 ways, for example, as 134420836 + 253350889 = 11594^2 + 15917^2 .

It is not a de Polignac number, because 387771725 - 2⁶ = 387771661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 387771725.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 61070 + ... + 67119.

Almost surely, 2^387771725 is an apocalyptic number.

It is an amenable number.

387771725 is a deficient number, since it is larger than the sum of its proper divisors (140755645).

387771725 is a wasteful number, since it uses less digits than its factorization.

387771725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128221 (or 128205 counting only the distinct ones).

The product of its digits is 576240, while the sum is 47.

The square root of 387771725 is about 19691.9202974215. The cubic root of 387771725 is about 729.2202376242.

The spelling of 387771725 in words is "three hundred eighty-seven million, seven hundred seventy-one thousand, seven hundred twenty-five".