77097172 has 6 divisors (see below), whose sum is σ = 134920058. Its totient is φ = 38548584.

The previous prime is 77097169. The next prime is 77097187. The reversal of 77097172 is 27179077.

It can be written as a sum of positive squares in only one way, i.e., 56340036 + 20757136 = 7506^2 + 4556^2 .

It is a congruent number.

It is an unprimeable number.

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, 9637143 + ... + 9637150.

Almost surely, 2^77097172 is an apocalyptic number.

It is an amenable number.

77097172 is a deficient number, since it is larger than the sum of its proper divisors (57822886).

77097172 is a wasteful number, since it uses less digits than its factorization.

77097172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19274297 (or 19274295 counting only the distinct ones).

The product of its (nonzero) digits is 43218, while the sum is 40.

The square root of 77097172 is about 8780.4995302090. The cubic root of 77097172 is about 425.6109726970.

The spelling of 77097172 in words is "seventy-seven million, ninety-seven thousand, one hundred seventy-two".