390667 has 4 divisors (see below), whose sum is σ = 392616. Its totient is φ = 388720.

The previous prime is 390653. The next prime is 390671. The reversal of 390667 is 766093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766093 = 29 ⋅26417.

It is a cyclic number.

It is not a de Polignac number, because 390667 - 2⁷ = 390539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634 + ... + 1087.

It is an arithmetic number, because the mean of its divisors is an integer number (98154).

2³⁹⁰⁶⁶⁷ is an apocalyptic number.

390667 is a deficient number, since it is larger than the sum of its proper divisors (1949).

390667 is a wasteful number, since it uses less digits than its factorization.

390667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 390667 is about 625.0335990969. The cubic root of 390667 is about 73.1030632813.

The spelling of 390667 in words is "three hundred ninety thousand, six hundred sixty-seven".