1939944427 has 2 divisors, whose sum is σ = 1939944428. Its totient is φ = 1939944426.

The previous prime is 1939944371. The next prime is 1939944439. The reversal of 1939944427 is 7244499391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1939944427 - 2²³ = 1931555819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1939944467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969972213 + 969972214.

It is an arithmetic number, because the mean of its divisors is an integer number (969972214).

Almost surely, 2^1939944427 is an apocalyptic number.

1939944427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939944427 is an equidigital number, since it uses as much as digits as its factorization.

1939944427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 1939944427 is about 44044.8002265875. The cubic root of 1939944427 is about 1247.1817953799.

The spelling of 1939944427 in words is "one billion, nine hundred thirty-nine million, nine hundred forty-four thousand, four hundred twenty-seven".