2783981951 has 2 divisors, whose sum is σ = 2783981952. Its totient is φ = 2783981950.

The previous prime is 2783981909. The next prime is 2783982013. The reversal of 2783981951 is 1591893872.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2783981951 - 2⁶ = 2783981887 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2783981893 and 2783981902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2783971951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391990975 + 1391990976.

It is an arithmetic number, because the mean of its divisors is an integer number (1391990976).

Almost surely, 2^2783981951 is an apocalyptic number.

2783981951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2783981951 is an equidigital number, since it uses as much as digits as its factorization.

2783981951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 53.

The square root of 2783981951 is about 52763.4527964196. The cubic root of 2783981951 is about 1406.7668911079.

The spelling of 2783981951 in words is "two billion, seven hundred eighty-three million, nine hundred eighty-one thousand, nine hundred fifty-one".