387247297685 has 16 divisors (see below), whose sum is σ = 492072655536. Its totient is φ = 291550261248.

The previous prime is 387247297649. The next prime is 387247297721. The reversal of 387247297685 is 586792742783.

It is an interprime number because it is at equal distance from previous prime (387247297649) and next prime (387247297721).

It can be written as a sum of positive squares in 8 ways, for example, as 101277970564 + 285969327121 = 318242^2 + 534761^2 .

It is a cyclic number.

It is not a de Polignac number, because 387247297685 - 2²⁶ = 387180188821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877577 + ... + 1242833.

It is an arithmetic number, because the mean of its divisors is an integer number (30754540971).

Almost surely, 2^387247297685 is an apocalyptic number.

It is an amenable number.

387247297685 is a deficient number, since it is larger than the sum of its proper divisors (104825357851).

387247297685 is a wasteful number, since it uses less digits than its factorization.

387247297685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377752.

The product of its digits is 284497920, while the sum is 68.

The spelling of 387247297685 in words is "three hundred eighty-seven billion, two hundred forty-seven million, two hundred ninety-seven thousand, six hundred eighty-five".