77941543 has 4 divisors (see below), whose sum is σ = 78003208. Its totient is φ = 77879880.

The previous prime is 77941511. The next prime is 77941571. The reversal of 77941543 is 34514977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34514977 = 7 ⋅4930711.

It is a cyclic number.

It is not a de Polignac number, because 77941543 - 2⁵ = 77941511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77941496 and 77941505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77947543) 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, 28896 + ... + 31477.

It is an arithmetic number, because the mean of its divisors is an integer number (19500802).

Almost surely, 2^77941543 is an apocalyptic number.

77941543 is a deficient number, since it is larger than the sum of its proper divisors (61665).

77941543 is a wasteful number, since it uses less digits than its factorization.

77941543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61664.

The product of its digits is 105840, while the sum is 40.

The square root of 77941543 is about 8828.4507700955. The cubic root of 77941543 is about 427.1591035414.

The spelling of 77941543 in words is "seventy-seven million, nine hundred forty-one thousand, five hundred forty-three".