78345933 has 4 divisors (see below), whose sum is σ = 104461248. Its totient is φ = 52230620.

The previous prime is 78345931. The next prime is 78345947. The reversal of 78345933 is 33954387.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 78345933 - 2¹ = 78345931 is a prime.

It is a super-2 number, since 2×78345933² = 12276170435280978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78345931) 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, 13057653 + ... + 13057658.

It is an arithmetic number, because the mean of its divisors is an integer number (26115312).

Almost surely, 2^78345933 is an apocalyptic number.

It is an amenable number.

78345933 is a deficient number, since it is larger than the sum of its proper divisors (26115315).

78345933 is a wasteful number, since it uses less digits than its factorization.

78345933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26115314.

The product of its digits is 272160, while the sum is 42.

The square root of 78345933 is about 8851.3237992969. The cubic root of 78345933 is about 427.8965835240.

The spelling of 78345933 in words is "seventy-eight million, three hundred forty-five thousand, nine hundred thirty-three".