390777 has 4 divisors (see below), whose sum is σ = 521040. Its totient is φ = 260516.

The previous prime is 390763. The next prime is 390781. The reversal of 390777 is 777093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390777 is a prime.

It is a D-number.

390777 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (390707) 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 in 3 ways as a sum of consecutive naturals, for example, 65127 + ... + 65132.

It is an arithmetic number, because the mean of its divisors is an integer number (130260).

2³⁹⁰⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

390777 is a deficient number, since it is larger than the sum of its proper divisors (130263).

390777 is a wasteful number, since it uses less digits than its factorization.

390777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130262.

The product of its (nonzero) digits is 9261, while the sum is 33.

The square root of 390777 is about 625.1215881731. The cubic root of 390777 is about 73.1099238406.

The spelling of 390777 in words is "three hundred ninety thousand, seven hundred seventy-seven".