772278823 has 2 divisors, whose sum is σ = 772278824. Its totient is φ = 772278822.

The previous prime is 772278817. The next prime is 772278827. The reversal of 772278823 is 328872277.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 772278823 - 2¹⁷ = 772147751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (772278827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386139411 + 386139412.

It is an arithmetic number, because the mean of its divisors is an integer number (386139412).

Almost surely, 2^772278823 is an apocalyptic number.

772278823 is a deficient number, since it is larger than the sum of its proper divisors (1).

772278823 is an equidigital number, since it uses as much as digits as its factorization.

772278823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 526848, while the sum is 46.

The square root of 772278823 is about 27789.9050556133. The cubic root of 772278823 is about 917.4689500885.

The spelling of 772278823 in words is "seven hundred seventy-two million, two hundred seventy-eight thousand, eight hundred twenty-three".