387862661 has 2 divisors, whose sum is σ = 387862662. Its totient is φ = 387862660.

The previous prime is 387862649. The next prime is 387862693. The reversal of 387862661 is 166268783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387853636 + 9025 = 19694^2 + 95^2 .

It is an emirp because it is prime and its reverse (166268783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387862661 - 2⁶ = 387862597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387862621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193931330 + 193931331.

It is an arithmetic number, because the mean of its divisors is an integer number (193931331).

Almost surely, 2^387862661 is an apocalyptic number.

It is an amenable number.

387862661 is a deficient number, since it is larger than the sum of its proper divisors (1).

387862661 is an equidigital number, since it uses as much as digits as its factorization.

387862661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 387862661 is about 19694.2291293668. The cubic root of 387862661 is about 729.2772360972.

The spelling of 387862661 in words is "three hundred eighty-seven million, eight hundred sixty-two thousand, six hundred sixty-one".