78329315 has 4 divisors (see below), whose sum is σ = 93995184. Its totient is φ = 62663448.

The previous prime is 78329269. The next prime is 78329327. The reversal of 78329315 is 51392387.

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 78329315 - 2⁸ = 78329059 is a prime.

It is a super-2 number, since 2×78329315² = 12270963176738450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7832927 + ... + 7832936.

It is an arithmetic number, because the mean of its divisors is an integer number (23498796).

Almost surely, 2^78329315 is an apocalyptic number.

78329315 is a deficient number, since it is larger than the sum of its proper divisors (15665869).

78329315 is a wasteful number, since it uses less digits than its factorization.

78329315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15665868.

The product of its digits is 45360, while the sum is 38.

The square root of 78329315 is about 8850.3850198734. The cubic root of 78329315 is about 427.8663275895.

The spelling of 78329315 in words is "seventy-eight million, three hundred twenty-nine thousand, three hundred fifteen".