83778311 has 2 divisors, whose sum is σ = 83778312. Its totient is φ = 83778310.

The previous prime is 83778307. The next prime is 83778347. The reversal of 83778311 is 11387738.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83778311 - 2² = 83778307 is a 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 (83778301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41889155 + 41889156.

It is an arithmetic number, because the mean of its divisors is an integer number (41889156).

Almost surely, 2^83778311 is an apocalyptic number.

83778311 is a deficient number, since it is larger than the sum of its proper divisors (1).

83778311 is an equidigital number, since it uses as much as digits as its factorization.

83778311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 83778311 is about 9153.0492733296. The cubic root of 83778311 is about 437.5663002650.

The spelling of 83778311 in words is "eighty-three million, seven hundred seventy-eight thousand, three hundred eleven".