392987 has 8 divisors (see below), whose sum is σ = 463872. Its totient is φ = 325800.

The previous prime is 392983. The next prime is 393007. The reversal of 392987 is 789293.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 392987 - 2² = 392983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 392987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 1122.

It is an arithmetic number, because the mean of its divisors is an integer number (57984).

2³⁹²⁹⁸⁷ is an apocalyptic number.

392987 is a deficient number, since it is larger than the sum of its proper divisors (70885).

392987 is a wasteful number, since it uses less digits than its factorization.

392987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849.

The product of its digits is 27216, while the sum is 38.

The square root of 392987 is about 626.8867521331. The cubic root of 392987 is about 73.2474867802.

The spelling of 392987 in words is "three hundred ninety-two thousand, nine hundred eighty-seven".