1396329797 has 2 divisors, whose sum is σ = 1396329798. Its totient is φ = 1396329796.

The previous prime is 1396329751. The next prime is 1396329827. The reversal of 1396329797 is 7979236931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012130596 + 384199201 = 31814^2 + 19601^2 .

It is an emirp because it is prime and its reverse (7979236931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1396329797 - 2⁶ = 1396329733 is a prime.

It is a super-2 number, since 2×1396329797² = 3899473803980122418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396379797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698164898 + 698164899.

It is an arithmetic number, because the mean of its divisors is an integer number (698164899).

Almost surely, 2^1396329797 is an apocalyptic number.

It is an amenable number.

1396329797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396329797 is an equidigital number, since it uses as much as digits as its factorization.

1396329797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3857868, while the sum is 56.

The square root of 1396329797 is about 37367.4965310763. The cubic root of 1396329797 is about 1117.7105114516.

The spelling of 1396329797 in words is "one billion, three hundred ninety-six million, three hundred twenty-nine thousand, seven hundred ninety-seven".