1881907 has 2 divisors, whose sum is σ = 1881908. Its totient is φ = 1881906.

The previous prime is 1881899. The next prime is 1881937. The reversal of 1881907 is 7091881.

It is a weak prime.

It is an emirp because it is prime and its reverse (7091881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1881907 - 2³ = 1881899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1881937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940953 + 940954.

It is an arithmetic number, because the mean of its divisors is an integer number (940954).

2^1881907 is an apocalyptic number.

1881907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881907 is an equidigital number, since it uses as much as digits as its factorization.

1881907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1881907 is about 1371.8261551669. The cubic root of 1881907 is about 123.4618326330.

The spelling of 1881907 in words is "one million, eight hundred eighty-one thousand, nine hundred seven".