1320870694597 has 2 divisors, whose sum is σ = 1320870694598. Its totient is φ = 1320870694596.

The previous prime is 1320870694571. The next prime is 1320870694613. The reversal of 1320870694597 is 7954960780231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1121239560996 + 199631133601 = 1058886^2 + 446801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320870694597 - 2³⁵ = 1286510956229 is a prime.

It is a super-2 number, since 2×1320870694597² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320870604597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660435347298 + 660435347299.

It is an arithmetic number, because the mean of its divisors is an integer number (660435347299).

It is a 1-persistent number, because it is pandigital, but 2⋅1320870694597 = 2641741389194 is not.

Almost surely, 2^{1320870694597} is an apocalyptic number.

It is an amenable number.

1320870694597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320870694597 is an equidigital number, since it uses as much as digits as its factorization.

1320870694597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 1320870694597 in words is "one trillion, three hundred twenty billion, eight hundred seventy million, six hundred ninety-four thousand, five hundred ninety-seven".