77277321 has 40 divisors (see below), whose sum is σ = 128925984. Its totient is φ = 45722880.

The previous prime is 77277287. The next prime is 77277337. The reversal of 77277321 is 12377277.

It is not a de Polignac number, because 77277321 - 2¹¹ = 77275273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77277371) 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 39 ways as a sum of consecutive naturals, for example, 37305 + ... + 39321.

Almost surely, 2^77277321 is an apocalyptic number.

It is an amenable number.

77277321 is a deficient number, since it is larger than the sum of its proper divisors (51648663).

77277321 is a wasteful number, since it uses less digits than its factorization.

77277321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083 (or 2074 counting only the distinct ones).

The product of its digits is 28812, while the sum is 36.

The square root of 77277321 is about 8790.7520156128. The cubic root of 77277321 is about 425.9422159275.

The spelling of 77277321 in words is "seventy-seven million, two hundred seventy-seven thousand, three hundred twenty-one".