1238773771597 has 2 divisors, whose sum is σ = 1238773771598. Its totient is φ = 1238773771596.

The previous prime is 1238773771561. The next prime is 1238773771601. The reversal of 1238773771597 is 7951773778321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1236512864196 + 2260907401 = 1111986^2 + 47549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1238773771597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238773871597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619386885798 + 619386885799.

It is an arithmetic number, because the mean of its divisors is an integer number (619386885799).

Almost surely, 2^{1238773771597} is an apocalyptic number.

It is an amenable number.

1238773771597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238773771597 is an equidigital number, since it uses as much as digits as its factorization.

1238773771597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108909360, while the sum is 67.

The spelling of 1238773771597 in words is "one trillion, two hundred thirty-eight billion, seven hundred seventy-three million, seven hundred seventy-one thousand, five hundred ninety-seven".