2783992021 has 8 divisors (see below), whose sum is σ = 2823359000. Its totient is φ = 2744658432.

The previous prime is 2783991979. The next prime is 2783992027. The reversal of 2783992021 is 1202993872.

2783992021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 101787921 + 2682204100 = 10089^2 + 51790^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2783992021 - 2¹⁹ = 2783467733 is a prime.

It is a super-2 number, since 2×2783992021² = 15501223145983328882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2783992027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193741 + ... + 207613.

It is an arithmetic number, because the mean of its divisors is an integer number (352919875).

Almost surely, 2^2783992021 is an apocalyptic number.

It is an amenable number.

2783992021 is a deficient number, since it is larger than the sum of its proper divisors (39366979).

2783992021 is a wasteful number, since it uses less digits than its factorization.

2783992021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16695.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 2783992021 is about 52763.5482222339. The cubic root of 2783992021 is about 1406.7685872546.

The spelling of 2783992021 in words is "two billion, seven hundred eighty-three million, nine hundred ninety-two thousand, twenty-one".