78396707 has 4 divisors (see below), whose sum is σ = 83008296. Its totient is φ = 73785120.

The previous prime is 78396701. The next prime is 78396739. The reversal of 78396707 is 70769387.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78396707 is a prime.

It is a super-2 number, since 2×78396707² = 12292087336887698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78396701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2305769 + ... + 2305802.

It is an arithmetic number, because the mean of its divisors is an integer number (20752074).

Almost surely, 2^78396707 is an apocalyptic number.

78396707 is a deficient number, since it is larger than the sum of its proper divisors (4611589).

78396707 is a wasteful number, since it uses less digits than its factorization.

78396707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611588.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 78396707 is about 8854.1914932985. The cubic root of 78396707 is about 427.9889998483.

The spelling of 78396707 in words is "seventy-eight million, three hundred ninety-six thousand, seven hundred seven".