78330969 has 10 divisors (see below), whose sum is σ = 117013050. Its totient is φ = 52220592.

The previous prime is 78330953. The next prime is 78330991. The reversal of 78330969 is 96903387.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66634569 + 11696400 = 8163^2 + 3420^2 .

It is not a de Polignac number, because 78330969 - 2⁴ = 78330953 is a prime.

It is a super-2 number, since 2×78330969² = 12271481408957922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78330919) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 483444 + ... + 483605.

It is an arithmetic number, because the mean of its divisors is an integer number (11701305).

Almost surely, 2^78330969 is an apocalyptic number.

It is an amenable number.

78330969 is a deficient number, since it is larger than the sum of its proper divisors (38682081).

78330969 is an equidigital number, since it uses as much as digits as its factorization.

78330969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967061 (or 967052 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 78330969 is about 8850.4784616426. The cubic root of 78330969 is about 427.8693391735.

The spelling of 78330969 in words is "seventy-eight million, three hundred thirty thousand, nine hundred sixty-nine".