1982291 has 2 divisors, whose sum is σ = 1982292. Its totient is φ = 1982290.

The previous prime is 1982287. The next prime is 1982293. The reversal of 1982291 is 1922891.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1922891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1982291 - 2² = 1982287 is a prime.

Together with 1982293, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1982293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991145 + 991146.

It is an arithmetic number, because the mean of its divisors is an integer number (991146).

2^1982291 is an apocalyptic number.

1982291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982291 is an equidigital number, since it uses as much as digits as its factorization.

1982291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 32.

The square root of 1982291 is about 1407.9385640006. The cubic root of 1982291 is about 125.6191362988.

The spelling of 1982291 in words is "one million, nine hundred eighty-two thousand, two hundred ninety-one".