77009012 has 6 divisors (see below), whose sum is σ = 134765778. Its totient is φ = 38504504.

The previous prime is 77009003. The next prime is 77009017. The reversal of 77009012 is 21090077.

It can be written as a sum of positive squares in only one way, i.e., 52940176 + 24068836 = 7276^2 + 4906^2 .

It is a super-2 number, since 2×77009012² = 11860775858432288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77009017) 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, 9626123 + ... + 9626130.

It is an arithmetic number, because the mean of its divisors is an integer number (22460963).

Almost surely, 2^77009012 is an apocalyptic number.

It is an amenable number.

77009012 is a deficient number, since it is larger than the sum of its proper divisors (57756766).

77009012 is a wasteful number, since it uses less digits than its factorization.

77009012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19252257 (or 19252255 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 77009012 is about 8775.4778787255. The cubic root of 77009012 is about 425.4486832405.

Adding to 77009012 its reverse (21090077), we get a palindrome (98099089).

The spelling of 77009012 in words is "seventy-seven million, nine thousand, twelve".