78823331 has 4 divisors (see below), whose sum is σ = 79114464. Its totient is φ = 78532200.

The previous prime is 78823321. The next prime is 78823333. The reversal of 78823331 is 13332887.

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 78823331 - 2¹⁸ = 78561187 is a prime.

It is a super-2 number, since 2×78823331² = 12426235019871122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78823291 and 78823300.

It is not an unprimeable number, because it can be changed into a prime (78823333) 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, 145160 + ... + 145701.

It is an arithmetic number, because the mean of its divisors is an integer number (19778616).

Almost surely, 2^78823331 is an apocalyptic number.

78823331 is a deficient number, since it is larger than the sum of its proper divisors (291133).

78823331 is a wasteful number, since it uses less digits than its factorization.

78823331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291132.

The product of its digits is 24192, while the sum is 35.

The square root of 78823331 is about 8878.2504470194. The cubic root of 78823331 is about 428.7639480711.

The spelling of 78823331 in words is "seventy-eight million, eight hundred twenty-three thousand, three hundred thirty-one".