1984720499 has 4 divisors (see below), whose sum is σ = 1984811400. Its totient is φ = 1984629600.

The previous prime is 1984720489. The next prime is 1984720511. The reversal of 1984720499 is 9940274891.

It is a semiprime because it is the product of two primes, 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 1984720499 - 2¹² = 1984716403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1984720499.

It is not an unprimeable number, because it can be changed into a prime (1984720429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9227 + ... + 63675.

It is an arithmetic number, because the mean of its divisors is an integer number (496202850).

Almost surely, 2^1984720499 is an apocalyptic number.

1984720499 is a deficient number, since it is larger than the sum of its proper divisors (90901).

1984720499 is an equidigital number, since it uses as much as digits as its factorization.

1984720499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90900.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 1984720499 is about 44550.2020085207. The cubic root of 1984720499 is about 1256.7043501831.

The spelling of 1984720499 in words is "one billion, nine hundred eighty-four million, seven hundred twenty thousand, four hundred ninety-nine".