1395826387993 has 2 divisors, whose sum is σ = 1395826387994. Its totient is φ = 1395826387992.

The previous prime is 1395826387973. The next prime is 1395826388023. The reversal of 1395826387993 is 3997836285931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1390446605584 + 5379782409 = 1179172^2 + 73347^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395826387993 - 2³³ = 1387236453401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1395826387973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697913193996 + 697913193997.

It is an arithmetic number, because the mean of its divisors is an integer number (697913193997).

Almost surely, 2^{1395826387993} is an apocalyptic number.

It is an amenable number.

1395826387993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395826387993 is an equidigital number, since it uses as much as digits as its factorization.

1395826387993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529079040, while the sum is 73.

The spelling of 1395826387993 in words is "one trillion, three hundred ninety-five billion, eight hundred twenty-six million, three hundred eighty-seven thousand, nine hundred ninety-three".