77816197 has 8 divisors (see below), whose sum is σ = 79744896. Its totient is φ = 75892992.

The previous prime is 77816173. The next prime is 77816203. The reversal of 77816197 is 79161877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77816197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77816117) 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 7 ways as a sum of consecutive naturals, for example, 51588 + ... + 53074.

It is an arithmetic number, because the mean of its divisors is an integer number (9968112).

Almost surely, 2^77816197 is an apocalyptic number.

It is an amenable number.

77816197 is a deficient number, since it is larger than the sum of its proper divisors (1928699).

77816197 is a wasteful number, since it uses less digits than its factorization.

77816197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747.

The product of its digits is 148176, while the sum is 46.

The square root of 77816197 is about 8821.3489331281. The cubic root of 77816197 is about 426.9299941724.

The spelling of 77816197 in words is "seventy-seven million, eight hundred sixteen thousand, one hundred ninety-seven".