1945988339 has 2 divisors, whose sum is σ = 1945988340. Its totient is φ = 1945988338.

The previous prime is 1945988299. The next prime is 1945988353. The reversal of 1945988339 is 9338895491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945988339 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1945988039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972994169 + 972994170.

It is an arithmetic number, because the mean of its divisors is an integer number (972994170).

Almost surely, 2^1945988339 is an apocalyptic number.

1945988339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945988339 is an equidigital number, since it uses as much as digits as its factorization.

1945988339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 59.

The square root of 1945988339 is about 44113.3578295736. The cubic root of 1945988339 is about 1248.4756541715.

The spelling of 1945988339 in words is "one billion, nine hundred forty-five million, nine hundred eighty-eight thousand, three hundred thirty-nine".