2782999421 has 2 divisors, whose sum is σ = 2782999422. Its totient is φ = 2782999420.

The previous prime is 2782999409. The next prime is 2782999423. The reversal of 2782999421 is 1249992872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2782562500 + 436921 = 52750^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782999421 - 2¹⁰ = 2782998397 is a prime.

It is a Sophie Germain prime.

Together with 2782999423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2782999423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391499710 + 1391499711.

It is an arithmetic number, because the mean of its divisors is an integer number (1391499711).

Almost surely, 2^2782999421 is an apocalyptic number.

It is an amenable number.

2782999421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782999421 is an equidigital number, since it uses as much as digits as its factorization.

2782999421 is an evil number, because the sum of its binary digits is even.

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

The square root of 2782999421 is about 52754.1412687194. The cubic root of 2782999421 is about 1406.6013783841.

The spelling of 2782999421 in words is "two billion, seven hundred eighty-two million, nine hundred ninety-nine thousand, four hundred twenty-one".