77219368 has 8 divisors (see below), whose sum is σ = 144786330. Its totient is φ = 38609680.

The previous prime is 77219353. The next prime is 77219383. The reversal of 77219368 is 86391277.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77219353) and next prime (77219383).

It can be written as a sum of positive squares in only one way, i.e., 69255684 + 7963684 = 8322^2 + 2822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4826203 + ... + 4826218.

Almost surely, 2^77219368 is an apocalyptic number.

It is an amenable number.

77219368 is a deficient number, since it is larger than the sum of its proper divisors (67566962).

77219368 is a wasteful number, since it uses less digits than its factorization.

77219368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652427 (or 9652423 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 77219368 is about 8787.4551492454. The cubic root of 77219368 is about 425.8357129150.

The spelling of 77219368 in words is "seventy-seven million, two hundred nineteen thousand, three hundred sixty-eight".