387961843 has 4 divisors (see below), whose sum is σ = 389911600. Its totient is φ = 386012088.

The previous prime is 387961831. The next prime is 387961853. The reversal of 387961843 is 348169783.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 387961843 - 2⁹ = 387961331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387961813) 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, 974580 + ... + 974977.

It is an arithmetic number, because the mean of its divisors is an integer number (97477900).

Almost surely, 2^387961843 is an apocalyptic number.

387961843 is a deficient number, since it is larger than the sum of its proper divisors (1949757).

387961843 is a wasteful number, since it uses less digits than its factorization.

387961843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949756.

The product of its digits is 870912, while the sum is 49.

The square root of 387961843 is about 19696.7470156876. The cubic root of 387961843 is about 729.3393929873.

The spelling of 387961843 in words is "three hundred eighty-seven million, nine hundred sixty-one thousand, eight hundred forty-three".