78330673 has 4 divisors (see below), whose sum is σ = 82453360. Its totient is φ = 74207988.

The previous prime is 78330667. The next prime is 78330677. The reversal of 78330673 is 37603387.

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 a de Polignac number, because none of the positive numbers 2^k-78330673 is a prime.

It is a super-2 number, since 2×78330673² = 12271388665265858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78330677) 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, 2061315 + ... + 2061352.

It is an arithmetic number, because the mean of its divisors is an integer number (20613340).

Almost surely, 2^78330673 is an apocalyptic number.

It is an amenable number.

78330673 is a deficient number, since it is larger than the sum of its proper divisors (4122687).

78330673 is a wasteful number, since it uses less digits than its factorization.

78330673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122686.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 78330673 is about 8850.4617393670. The cubic root of 78330673 is about 427.8688002232.

It can be divided in two parts, 78330 and 673, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 78330673 in words is "seventy-eight million, three hundred thirty thousand, six hundred seventy-three".