78740323 has 4 divisors (see below), whose sum is σ = 79152768. Its totient is φ = 78327880.

The previous prime is 78740273. The next prime is 78740371. The reversal of 78740323 is 32304787.

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 78740323 - 2¹³ = 78732131 is a prime.

It is a super-2 number, since 2×78740323² = 12400076932288658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78740383) 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, 205936 + ... + 206317.

It is an arithmetic number, because the mean of its divisors is an integer number (19788192).

Almost surely, 2^78740323 is an apocalyptic number.

78740323 is a deficient number, since it is larger than the sum of its proper divisors (412445).

78740323 is a wasteful number, since it uses less digits than its factorization.

78740323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412444.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 78740323 is about 8873.5744207168. The cubic root of 78740323 is about 428.6133863101.

The spelling of 78740323 in words is "seventy-eight million, seven hundred forty thousand, three hundred twenty-three".