1339924661 has 2 divisors, whose sum is σ = 1339924662. Its totient is φ = 1339924660.

The previous prime is 1339924657. The next prime is 1339924679. The reversal of 1339924661 is 1664299331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 942121636 + 397803025 = 30694^2 + 19945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1339924661 - 2² = 1339924657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1339924561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669962330 + 669962331.

It is an arithmetic number, because the mean of its divisors is an integer number (669962331).

Almost surely, 2^1339924661 is an apocalyptic number.

It is an amenable number.

1339924661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1339924661 is an equidigital number, since it uses as much as digits as its factorization.

1339924661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 1339924661 is about 36604.9813686607. The cubic root of 1339924661 is about 1102.4531095522.

The spelling of 1339924661 in words is "one billion, three hundred thirty-nine million, nine hundred twenty-four thousand, six hundred sixty-one".