229920777 has 12 divisors (see below), whose sum is σ = 332853300. Its totient is φ = 152936448.

The previous prime is 229920763. The next prime is 229920793. The reversal of 229920777 is 777029922.

It can be written as a sum of positive squares in 2 ways, for example, as 51538041 + 178382736 = 7179^2 + 13356^2 .

It is a de Polignac number, because none of the positive numbers 2^k-229920777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (229920277) 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 in 11 ways as a sum of consecutive naturals, for example, 24408 + ... + 32489.

It is an arithmetic number, because the mean of its divisors is an integer number (27737775).

Almost surely, 2^229920777 is an apocalyptic number.

It is an amenable number.

229920777 is a deficient number, since it is larger than the sum of its proper divisors (102932523).

229920777 is a wasteful number, since it uses less digits than its factorization.

229920777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57352 (or 57349 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 229920777 is about 15163.1387581859. The cubic root of 229920777 is about 612.6222125700.

The spelling of 229920777 in words is "two hundred twenty-nine million, nine hundred twenty thousand, seven hundred seventy-seven".