77987283 has 16 divisors (see below), whose sum is σ = 114379392. Its totient is φ = 47262600.

The previous prime is 77987281. The next prime is 77987309. The reversal of 77987283 is 38278977.

It is not a de Polignac number, because 77987283 - 2¹ = 77987281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77987281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5773 + ... + 13758.

It is an arithmetic number, because the mean of its divisors is an integer number (7148712).

Almost surely, 2^77987283 is an apocalyptic number.

77987283 is a deficient number, since it is larger than the sum of its proper divisors (36392109).

77987283 is a wasteful number, since it uses less digits than its factorization.

77987283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19567 (or 19545 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 51.

The square root of 77987283 is about 8831.0408786281. The cubic root of 77987283 is about 427.2426466511.

The spelling of 77987283 in words is "seventy-seven million, nine hundred eighty-seven thousand, two hundred eighty-three".