78237443 has 2 divisors, whose sum is σ = 78237444. Its totient is φ = 78237442.

The previous prime is 78237433. The next prime is 78237449. The reversal of 78237443 is 34473287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78237443 - 2¹² = 78233347 is a prime.

It is a super-2 number, since 2×78237443² = 12242194974356498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78237397 and 78237406.

It is not a weakly prime, because it can be changed into another prime (78237449) 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 as a sum of consecutive naturals, namely, 39118721 + 39118722.

It is an arithmetic number, because the mean of its divisors is an integer number (39118722).

Almost surely, 2^78237443 is an apocalyptic number.

78237443 is a deficient number, since it is larger than the sum of its proper divisors (1).

78237443 is an equidigital number, since it uses as much as digits as its factorization.

78237443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 38.

The square root of 78237443 is about 8845.1932143962. The cubic root of 78237443 is about 427.6989815000.

The spelling of 78237443 in words is "seventy-eight million, two hundred thirty-seven thousand, four hundred forty-three".