78314293 has 4 divisors (see below), whose sum is σ = 78335820. Its totient is φ = 78292768.

The previous prime is 78314281. The next prime is 78314303. The reversal of 78314293 is 39241387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39241387 = 41 ⋅957107.

It can be written as a sum of positive squares in 2 ways, for example, as 9474084 + 68840209 = 3078^2 + 8297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78314293 is a prime.

It is a super-2 number, since 2×78314293² = 12266256976179698, 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 (78314233) 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, 3808 + ... + 13081.

It is an arithmetic number, because the mean of its divisors is an integer number (19583955).

Almost surely, 2^78314293 is an apocalyptic number.

It is an amenable number.

78314293 is a deficient number, since it is larger than the sum of its proper divisors (21527).

78314293 is a wasteful number, since it uses less digits than its factorization.

78314293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21526.

The product of its digits is 36288, while the sum is 37.

The square root of 78314293 is about 8849.5363155365. The cubic root of 78314293 is about 427.8389737655.

The spelling of 78314293 in words is "seventy-eight million, three hundred fourteen thousand, two hundred ninety-three".