77103412 has 12 divisors (see below), whose sum is σ = 138578020. Its totient is φ = 37509696.

The previous prime is 77103391. The next prime is 77103419. The reversal of 77103412 is 21430177.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38489616 + 38613796 = 6204^2 + 6214^2 .

It is a super-2 number, since 2×77103412² = 11889872284083488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77103419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260337 + ... + 260632.

Almost surely, 2^77103412 is an apocalyptic number.

It is an amenable number.

77103412 is a deficient number, since it is larger than the sum of its proper divisors (61474608).

77103412 is a wasteful number, since it uses less digits than its factorization.

77103412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521010 (or 521008 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 77103412 is about 8780.8548558782. The cubic root of 77103412 is about 425.6224549203.

Adding to 77103412 its reverse (21430177), we get a palindrome (98533589).

The spelling of 77103412 in words is "seventy-seven million, one hundred three thousand, four hundred twelve".