1939416643 has 2 divisors, whose sum is σ = 1939416644. Its totient is φ = 1939416642.

The previous prime is 1939416607. The next prime is 1939416653. The reversal of 1939416643 is 3466149391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1939416643 - 2¹⁷ = 1939285571 is a prime.

It is a super-2 number, since 2×1939416643² = 7522673830290778898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1939416593 and 1939416602.

It is not a weakly prime, because it can be changed into another prime (1939416653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969708321 + 969708322.

It is an arithmetic number, because the mean of its divisors is an integer number (969708322).

Almost surely, 2^1939416643 is an apocalyptic number.

1939416643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939416643 is an equidigital number, since it uses as much as digits as its factorization.

1939416643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 1939416643 is about 44038.8083739785. The cubic root of 1939416643 is about 1247.0686817788.

The spelling of 1939416643 in words is "one billion, nine hundred thirty-nine million, four hundred sixteen thousand, six hundred forty-three".