1881937 has 2 divisors, whose sum is σ = 1881938. Its totient is φ = 1881936.

The previous prime is 1881907. The next prime is 1881949. The reversal of 1881937 is 7391881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 163216 = 1311^2 + 404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1881937 is a prime.

1881937 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1881896 and 1881905.

It is not a weakly prime, because it can be changed into another prime (1881907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940968 + 940969.

It is an arithmetic number, because the mean of its divisors is an integer number (940969).

2^1881937 is an apocalyptic number.

It is an amenable number.

1881937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881937 is an equidigital number, since it uses as much as digits as its factorization.

1881937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 37.

The square root of 1881937 is about 1371.8370894534. The cubic root of 1881937 is about 123.4624886759.

The spelling of 1881937 in words is "one million, eight hundred eighty-one thousand, nine hundred thirty-seven".