1984748771 has 4 divisors (see below), whose sum is σ = 1986268632. Its totient is φ = 1983228912.

The previous prime is 1984748767. The next prime is 1984748789. The reversal of 1984748771 is 1778474891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1984748771 - 2² = 1984748767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1984748791) 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, 757970 + ... + 760583.

It is an arithmetic number, because the mean of its divisors is an integer number (496567158).

Almost surely, 2^1984748771 is an apocalyptic number.

1984748771 is a deficient number, since it is larger than the sum of its proper divisors (1519861).

1984748771 is a wasteful number, since it uses less digits than its factorization.

1984748771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519860.

The product of its digits is 3161088, while the sum is 56.

The square root of 1984748771 is about 44550.5193123492. The cubic root of 1984748771 is about 1256.7103173334.

The spelling of 1984748771 in words is "one billion, nine hundred eighty-four million, seven hundred forty-eight thousand, seven hundred seventy-one".