391379 has 2 divisors, whose sum is σ = 391380. Its totient is φ = 391378.

The previous prime is 391373. The next prime is 391387. The reversal of 391379 is 973193.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (391373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195689 + 195690.

It is an arithmetic number, because the mean of its divisors is an integer number (195690).

2³⁹¹³⁷⁹ is an apocalyptic number.

391379 is a deficient number, since it is larger than the sum of its proper divisors (1).

391379 is an equidigital number, since it uses as much as digits as its factorization.

391379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103, while the sum is 32.

The square root of 391379 is about 625.6029092004. The cubic root of 391379 is about 73.1474470255.

The spelling of 391379 in words is "three hundred ninety-one thousand, three hundred seventy-nine".