78243043 has 2 divisors, whose sum is σ = 78243044. Its totient is φ = 78243042.

The previous prime is 78243037. The next prime is 78243059. The reversal of 78243043 is 34034287.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78243043 is a prime.

It is a super-2 number, since 2×78243043² = 12243947555799698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78242996 and 78243014.

It is not a weakly prime, because it can be changed into another prime (78243343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39121521 + 39121522.

It is an arithmetic number, because the mean of its divisors is an integer number (39121522).

Almost surely, 2^78243043 is an apocalyptic number.

78243043 is a deficient number, since it is larger than the sum of its proper divisors (1).

78243043 is an equidigital number, since it uses as much as digits as its factorization.

78243043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 78243043 is about 8845.5097648468. The cubic root of 78243043 is about 427.7091857239.

The spelling of 78243043 in words is "seventy-eight million, two hundred forty-three thousand, forty-three".