1390856479487 has 2 divisors, whose sum is σ = 1390856479488. Its totient is φ = 1390856479486.

The previous prime is 1390856479469. The next prime is 1390856479499. The reversal of 1390856479487 is 7849746580931.

It is a strong prime.

It is an emirp because it is prime and its reverse (7849746580931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1390856479487 - 2¹⁶ = 1390856413951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1390856479487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390856475487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695428239743 + 695428239744.

It is an arithmetic number, because the mean of its divisors is an integer number (695428239744).

Almost surely, 2^{1390856479487} is an apocalyptic number.

1390856479487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390856479487 is an equidigital number, since it uses as much as digits as its factorization.

1390856479487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 365783040, while the sum is 71.

The spelling of 1390856479487 in words is "one trillion, three hundred ninety billion, eight hundred fifty-six million, four hundred seventy-nine thousand, four hundred eighty-seven".