1390797361787 has 2 divisors, whose sum is σ = 1390797361788. Its totient is φ = 1390797361786.

The previous prime is 1390797361739. The next prime is 1390797361813. The reversal of 1390797361787 is 7871637970931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1390797361787 - 2¹⁰ = 1390797360763 is a prime.

It is not a weakly prime, because it can be changed into another prime (1390797361487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695398680893 + 695398680894.

It is an arithmetic number, because the mean of its divisors is an integer number (695398680894).

Almost surely, 2^{1390797361787} is an apocalyptic number.

1390797361787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390797361787 is an equidigital number, since it uses as much as digits as its factorization.

1390797361787 is an evil number, because the sum of its binary digits is even.

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

The spelling of 1390797361787 in words is "one trillion, three hundred ninety billion, seven hundred ninety-seven million, three hundred sixty-one thousand, seven hundred eighty-seven".