77988043 has 4 divisors (see below), whose sum is σ = 89129200. Its totient is φ = 66846888.

The previous prime is 77987981. The next prime is 77988049. The reversal of 77988043 is 34088977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34088977 = 13 ⋅2622229.

It is a cyclic number.

It is not a de Polignac number, because 77988043 - 2¹³ = 77979851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77987984 and 77988002.

It is not an unprimeable number, because it can be changed into a prime (77988049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5570568 + ... + 5570581.

It is an arithmetic number, because the mean of its divisors is an integer number (22282300).

Almost surely, 2^77988043 is an apocalyptic number.

77988043 is a deficient number, since it is larger than the sum of its proper divisors (11141157).

77988043 is a wasteful number, since it uses less digits than its factorization.

77988043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141156.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 77988043 is about 8831.0839085585. The cubic root of 77988043 is about 427.2440344986.

The spelling of 77988043 in words is "seventy-seven million, nine hundred eighty-eight thousand, forty-three".