77982643 has 8 divisors (see below), whose sum is σ = 80289440. Its totient is φ = 75686400.

The previous prime is 77982629. The next prime is 77982649. The reversal of 77982643 is 34628977.

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

It is a cyclic number.

It is not a de Polignac number, because 77982643 - 2¹³ = 77974451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77982593 and 77982602.

It is not an unprimeable number, because it can be changed into a prime (77982649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13843 + ... + 18643.

It is an arithmetic number, because the mean of its divisors is an integer number (10036180).

Almost surely, 2^77982643 is an apocalyptic number.

77982643 is a deficient number, since it is larger than the sum of its proper divisors (2306797).

77982643 is a wasteful number, since it uses less digits than its factorization.

77982643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5277.

The product of its digits is 508032, while the sum is 46.

The square root of 77982643 is about 8830.7781650317. The cubic root of 77982643 is about 427.2341732816.

The spelling of 77982643 in words is "seventy-seven million, nine hundred eighty-two thousand, six hundred forty-three".