387756361 has 4 divisors (see below), whose sum is σ = 401127300. Its totient is φ = 374385424.

The previous prime is 387756359. The next prime is 387756371. The reversal of 387756361 is 163657783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163657783 = 2861 ⋅57203.

It can be written as a sum of positive squares in 2 ways, for example, as 167055625 + 220700736 = 12925^2 + 14856^2 .

It is a cyclic number.

It is not a de Polignac number, because 387756361 - 2¹ = 387756359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387756371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6685426 + ... + 6685483.

It is an arithmetic number, because the mean of its divisors is an integer number (100281825).

Almost surely, 2^387756361 is an apocalyptic number.

It is an amenable number.

387756361 is a deficient number, since it is larger than the sum of its proper divisors (13370939).

387756361 is a wasteful number, since it uses less digits than its factorization.

387756361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13370938.

The product of its digits is 635040, while the sum is 46.

The square root of 387756361 is about 19691.5301843204. The cubic root of 387756361 is about 729.2106066248.

The spelling of 387756361 in words is "three hundred eighty-seven million, seven hundred fifty-six thousand, three hundred sixty-one".