1390141939 has 2 divisors, whose sum is σ = 1390141940. Its totient is φ = 1390141938.

The previous prime is 1390141937. The next prime is 1390141957. The reversal of 1390141939 is 9391410931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1390141939 - 2¹ = 1390141937 is a prime.

It is a super-2 number, since 2×1390141939² = 3864989221133359442, which contains 22 as substring.

Together with 1390141937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1390141937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695070969 + 695070970.

It is an arithmetic number, because the mean of its divisors is an integer number (695070970).

Almost surely, 2^1390141939 is an apocalyptic number.

1390141939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390141939 is an equidigital number, since it uses as much as digits as its factorization.

1390141939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 1390141939 is about 37284.6072662701. The cubic root of 1390141939 is about 1116.0570158282.

The spelling of 1390141939 in words is "one billion, three hundred ninety million, one hundred forty-one thousand, nine hundred thirty-nine".