1397959 has 2 divisors, whose sum is σ = 1397960. Its totient is φ = 1397958.

The previous prime is 1397953. The next prime is 1397983. The reversal of 1397959 is 9597931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1397959 - 2³ = 1397951 is a prime.

1397959 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397951) 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, 698979 + 698980.

It is an arithmetic number, because the mean of its divisors is an integer number (698980).

2^1397959 is an apocalyptic number.

1397959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397959 is an equidigital number, since it uses as much as digits as its factorization.

1397959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 43.

The square root of 1397959 is about 1182.3531621305. The cubic root of 1397959 is about 111.8145048134.

The spelling of 1397959 in words is "one million, three hundred ninety-seven thousand, nine hundred fifty-nine".