78245743 has 4 divisors (see below), whose sum is σ = 82363960. Its totient is φ = 74127528.

The previous prime is 78245723. The next prime is 78245773. The reversal of 78245743 is 34754287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78245743 - 2⁹ = 78245231 is a prime.

It is a super-2 number, since 2×78245743² = 12244792595244098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78245696 and 78245705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78245723) 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, 2059080 + ... + 2059117.

It is an arithmetic number, because the mean of its divisors is an integer number (20590990).

Almost surely, 2^78245743 is an apocalyptic number.

78245743 is a deficient number, since it is larger than the sum of its proper divisors (4118217).

78245743 is a wasteful number, since it uses less digits than its factorization.

78245743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118216.

The product of its digits is 188160, while the sum is 40.

The square root of 78245743 is about 8845.6623833379. The cubic root of 78245743 is about 427.7141054436.

The spelling of 78245743 in words is "seventy-eight million, two hundred forty-five thousand, seven hundred forty-three".