1982957729 has 4 divisors (see below), whose sum is σ = 1983050160. Its totient is φ = 1982865300.

The previous prime is 1982957723. The next prime is 1982957747. The reversal of 1982957729 is 9277592891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1982957729 - 2¹² = 1982953633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1982957723) 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 in 3 ways as a sum of consecutive naturals, for example, 4562 + ... + 63140.

It is an arithmetic number, because the mean of its divisors is an integer number (495762540).

Almost surely, 2^1982957729 is an apocalyptic number.

It is an amenable number.

1982957729 is a deficient number, since it is larger than the sum of its proper divisors (92431).

1982957729 is an equidigital number, since it uses as much as digits as its factorization.

1982957729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92430.

The product of its digits is 5715360, while the sum is 59.

The square root of 1982957729 is about 44530.4135282842. The cubic root of 1982957729 is about 1256.3321841104.

The spelling of 1982957729 in words is "one billion, nine hundred eighty-two million, nine hundred fifty-seven thousand, seven hundred twenty-nine".