1396979 has 2 divisors, whose sum is σ = 1396980. Its totient is φ = 1396978.

The previous prime is 1396963. The next prime is 1396987. The reversal of 1396979 is 9796931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1396979 - 2⁴ = 1396963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1396909) 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 as a sum of consecutive naturals, namely, 698489 + 698490.

It is an arithmetic number, because the mean of its divisors is an integer number (698490).

2^1396979 is an apocalyptic number.

1396979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396979 is an equidigital number, since it uses as much as digits as its factorization.

1396979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 44.

The square root of 1396979 is about 1181.9386616910. The cubic root of 1396979 is about 111.7883705634.

The spelling of 1396979 in words is "one million, three hundred ninety-six thousand, nine hundred seventy-nine".