1940452139 has 2 divisors, whose sum is σ = 1940452140. Its totient is φ = 1940452138.

The previous prime is 1940452133. The next prime is 1940452207. The reversal of 1940452139 is 9312540491.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1940452139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1940452133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970226069 + 970226070.

It is an arithmetic number, because the mean of its divisors is an integer number (970226070).

Almost surely, 2^1940452139 is an apocalyptic number.

1940452139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940452139 is an equidigital number, since it uses as much as digits as its factorization.

1940452139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1940452139 is about 44050.5634356702. The cubic root of 1940452139 is about 1247.2905878317.

The spelling of 1940452139 in words is "one billion, nine hundred forty million, four hundred fifty-two thousand, one hundred thirty-nine".