1377608197397 has 2 divisors, whose sum is σ = 1377608197398. Its totient is φ = 1377608197396.

The previous prime is 1377608197369. The next prime is 1377608197439. The reversal of 1377608197397 is 7937918067731.

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., 1057258989361 + 320349208036 = 1028231^2 + 565994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377608197397 - 2¹⁰ = 1377608196373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377608197697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688804098698 + 688804098699.

It is an arithmetic number, because the mean of its divisors is an integer number (688804098699).

Almost surely, 2^{1377608197397} is an apocalyptic number.

It is an amenable number.

1377608197397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377608197397 is an equidigital number, since it uses as much as digits as its factorization.

1377608197397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84015792, while the sum is 68.

The spelling of 1377608197397 in words is "one trillion, three hundred seventy-seven billion, six hundred eight million, one hundred ninety-seven thousand, three hundred ninety-seven".