83278199 has 2 divisors, whose sum is σ = 83278200. Its totient is φ = 83278198.

The previous prime is 83278171. The next prime is 83278213. The reversal of 83278199 is 99187238.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83278199 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83278109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41639099 + 41639100.

It is an arithmetic number, because the mean of its divisors is an integer number (41639100).

Almost surely, 2^83278199 is an apocalyptic number.

83278199 is a deficient number, since it is larger than the sum of its proper divisors (1).

83278199 is an equidigital number, since it uses as much as digits as its factorization.

83278199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 83278199 is about 9125.6889602923. The cubic root of 83278199 is about 436.6938825632.

The spelling of 83278199 in words is "eighty-three million, two hundred seventy-eight thousand, one hundred ninety-nine".