1890334939 has 2 divisors, whose sum is σ = 1890334940. Its totient is φ = 1890334938.

The previous prime is 1890334937. The next prime is 1890334969. The reversal of 1890334939 is 9394330981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1890334939 - 2¹ = 1890334937 is a prime.

Together with 1890334937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1890334892 and 1890334901.

It is not a weakly prime, because it can be changed into another prime (1890334937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945167469 + 945167470.

It is an arithmetic number, because the mean of its divisors is an integer number (945167470).

Almost surely, 2^1890334939 is an apocalyptic number.

1890334939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890334939 is an equidigital number, since it uses as much as digits as its factorization.

1890334939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 1890334939 is about 43477.9822323898. The cubic root of 1890334939 is about 1236.4586215639.

The spelling of 1890334939 in words is "one billion, eight hundred ninety million, three hundred thirty-four thousand, nine hundred thirty-nine".