78204743 has 4 divisors (see below), whose sum is σ = 82805040. Its totient is φ = 73604448.

The previous prime is 78204739. The next prime is 78204767. The reversal of 78204743 is 34740287.

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 78204743 - 2² = 78204739 is a prime.

It is a super-2 number, since 2×78204743² = 12231963655392098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78200743) 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, 2300123 + ... + 2300156.

It is an arithmetic number, because the mean of its divisors is an integer number (20701260).

Almost surely, 2^78204743 is an apocalyptic number.

78204743 is a deficient number, since it is larger than the sum of its proper divisors (4600297).

78204743 is a wasteful number, since it uses less digits than its factorization.

78204743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600296.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 78204743 is about 8843.3445596109. The cubic root of 78204743 is about 427.6393863961.

The spelling of 78204743 in words is "seventy-eight million, two hundred four thousand, seven hundred forty-three".