77934473237 has 4 divisors (see below), whose sum is σ = 78257853036. Its totient is φ = 77611093440.

The previous prime is 77934473219. The next prime is 77934473249. The reversal of 77934473237 is 73237443977.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26647624081 + 51286849156 = 163241^2 + 226466^2 .

It is a cyclic number.

It is not a de Polignac number, because 77934473237 - 2¹² = 77934469141 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 (77934473437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161689538 + ... + 161690019.

It is an arithmetic number, because the mean of its divisors is an integer number (19564463259).

Almost surely, 2^77934473237 is an apocalyptic number.

It is an amenable number.

77934473237 is a deficient number, since it is larger than the sum of its proper divisors (323379799).

77934473237 is a wasteful number, since it uses less digits than its factorization.

77934473237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323379798.

The product of its digits is 18670176, while the sum is 56.

The spelling of 77934473237 in words is "seventy-seven billion, nine hundred thirty-four million, four hundred seventy-three thousand, two hundred thirty-seven".