1390977443 has 2 divisors, whose sum is σ = 1390977444. Its totient is φ = 1390977442.

The previous prime is 1390977433. The next prime is 1390977461. The reversal of 1390977443 is 3447790931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1390977443 - 2¹⁴ = 1390961059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1390977433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695488721 + 695488722.

It is an arithmetic number, because the mean of its divisors is an integer number (695488722).

Almost surely, 2^1390977443 is an apocalyptic number.

1390977443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390977443 is an equidigital number, since it uses as much as digits as its factorization.

1390977443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 47.

The square root of 1390977443 is about 37295.8099925447. The cubic root of 1390977443 is about 1116.2805621501.

The spelling of 1390977443 in words is "one billion, three hundred ninety million, nine hundred seventy-seven thousand, four hundred forty-three".