82778051 has 2 divisors, whose sum is σ = 82778052. Its totient is φ = 82778050.

The previous prime is 82778039. The next prime is 82778077. The reversal of 82778051 is 15087728.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82778051 - 2⁶ = 82777987 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 82777996 and 82778014.

It is not a weakly prime, because it can be changed into another prime (82778011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41389025 + 41389026.

It is an arithmetic number, because the mean of its divisors is an integer number (41389026).

Almost surely, 2^82778051 is an apocalyptic number.

82778051 is a deficient number, since it is larger than the sum of its proper divisors (1).

82778051 is an equidigital number, since it uses as much as digits as its factorization.

82778051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 82778051 is about 9098.2443910900. The cubic root of 82778051 is about 435.8179018901.

The spelling of 82778051 in words is "eighty-two million, seven hundred seventy-eight thousand, fifty-one".