1881493 has 2 divisors, whose sum is σ = 1881494. Its totient is φ = 1881492.

The previous prime is 1881479. The next prime is 1881499. The reversal of 1881493 is 3941881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119364 + 762129 = 1058^2 + 873^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881493 - 2⁵ = 1881461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1881499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940746 + 940747.

It is an arithmetic number, because the mean of its divisors is an integer number (940747).

2^1881493 is an apocalyptic number.

It is an amenable number.

1881493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881493 is an equidigital number, since it uses as much as digits as its factorization.

1881493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 1881493 is about 1371.6752531120. The cubic root of 1881493 is about 123.4527785286.

It can be divided in two parts, 188 and 1493, that added together give a square (1681 = 41²).

The spelling of 1881493 in words is "one million, eight hundred eighty-one thousand, four hundred ninety-three".