1982337491 has 2 divisors, whose sum is σ = 1982337492. Its totient is φ = 1982337490.

The previous prime is 1982337443. The next prime is 1982337503. The reversal of 1982337491 is 1947332891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1982337491 - 2¹⁰ = 1982336467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1982337391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991168745 + 991168746.

It is an arithmetic number, because the mean of its divisors is an integer number (991168746).

Almost surely, 2^1982337491 is an apocalyptic number.

1982337491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982337491 is an equidigital number, since it uses as much as digits as its factorization.

1982337491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 1982337491 is about 44523.4487770209. The cubic root of 1982337491 is about 1256.2011834665.

The spelling of 1982337491 in words is "one billion, nine hundred eighty-two million, three hundred thirty-seven thousand, four hundred ninety-one".