78530233 has 4 divisors (see below), whose sum is σ = 78653008. Its totient is φ = 78407460.

The previous prime is 78530213. The next prime is 78530273. The reversal of 78530233 is 33203587.

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 78530233 - 2⁹ = 78529721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78530195 and 78530204.

It is not an unprimeable number, because it can be changed into a prime (78530213) 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, 60423 + ... + 61708.

It is an arithmetic number, because the mean of its divisors is an integer number (19663252).

Almost surely, 2^78530233 is an apocalyptic number.

It is an amenable number.

78530233 is a deficient number, since it is larger than the sum of its proper divisors (122775).

78530233 is a wasteful number, since it uses less digits than its factorization.

78530233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122774.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 78530233 is about 8861.7285559873. The cubic root of 78530233 is about 428.2318469747.

The spelling of 78530233 in words is "seventy-eight million, five hundred thirty thousand, two hundred thirty-three".