1982891901 has 8 divisors (see below), whose sum is σ = 2715311584. Its totient is φ = 1286200080.

The previous prime is 1982891899. The next prime is 1982891909. The reversal of 1982891901 is 1091982891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1982891901 - 2¹ = 1982891899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982891909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8931835 + ... + 8932056.

It is an arithmetic number, because the mean of its divisors is an integer number (339413948).

Almost surely, 2^1982891901 is an apocalyptic number.

It is an amenable number.

1982891901 is a deficient number, since it is larger than the sum of its proper divisors (732419683).

1982891901 is a wasteful number, since it uses less digits than its factorization.

1982891901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17863931.

The product of its (nonzero) digits is 93312, while the sum is 48.

The square root of 1982891901 is about 44529.6743868625. The cubic root of 1982891901 is about 1256.3182818557.

The spelling of 1982891901 in words is "one billion, nine hundred eighty-two million, eight hundred ninety-one thousand, nine hundred one".