78344193 has 4 divisors (see below), whose sum is σ = 104458928. Its totient is φ = 52229460.

The previous prime is 78344179. The next prime is 78344219. The reversal of 78344193 is 39144387.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78344193 - 2⁶ = 78344129 is a prime.

It is a super-2 number, since 2×78344193² = 12275625153642498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78344173) 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, 13057363 + ... + 13057368.

It is an arithmetic number, because the mean of its divisors is an integer number (26114732).

Almost surely, 2^78344193 is an apocalyptic number.

It is an amenable number.

78344193 is a deficient number, since it is larger than the sum of its proper divisors (26114735).

78344193 is a wasteful number, since it uses less digits than its factorization.

78344193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26114734.

The product of its digits is 72576, while the sum is 39.

The square root of 78344193 is about 8851.2255083689. The cubic root of 78344193 is about 427.8934157545.

The spelling of 78344193 in words is "seventy-eight million, three hundred forty-four thousand, one hundred ninety-three".