1393246997 has 2 divisors, whose sum is σ = 1393246998. Its totient is φ = 1393246996.

The previous prime is 1393246993. The next prime is 1393247003. The reversal of 1393246997 is 7996423931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1368556036 + 24690961 = 36994^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393246997 - 2² = 1393246993 is a prime.

It is a super-2 number, since 2×1393246997² = 3882274389299036018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1393246993) 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 as a sum of consecutive naturals, namely, 696623498 + 696623499.

It is an arithmetic number, because the mean of its divisors is an integer number (696623499).

Almost surely, 2^1393246997 is an apocalyptic number.

It is an amenable number.

1393246997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393246997 is an equidigital number, since it uses as much as digits as its factorization.

1393246997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 53.

The square root of 1393246997 is about 37326.2239852895. The cubic root of 1393246997 is about 1116.8873494588.

The spelling of 1393246997 in words is "one billion, three hundred ninety-three million, two hundred forty-six thousand, nine hundred ninety-seven".