77890043 has 8 divisors (see below), whose sum is σ = 97109760. Its totient is φ = 60693480.

The previous prime is 77889997. The next prime is 77890061. The reversal of 77890043 is 34009877.

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 77890043 - 2¹⁴ = 77873659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77889979 and 77890006.

It is not an unprimeable number, because it can be changed into a prime (77890643) 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 7 ways as a sum of consecutive naturals, for example, 505703 + ... + 505856.

It is an arithmetic number, because the mean of its divisors is an integer number (12138720).

Almost surely, 2^77890043 is an apocalyptic number.

77890043 is a deficient number, since it is larger than the sum of its proper divisors (19219717).

77890043 is a wasteful number, since it uses less digits than its factorization.

77890043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011577.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 77890043 is about 8825.5335816029. The cubic root of 77890043 is about 427.0650007905.

The spelling of 77890043 in words is "seventy-seven million, eight hundred ninety thousand, forty-three".