78323947 has 32 divisors (see below), whose sum is σ = 98219520. Its totient is φ = 61585920.

The previous prime is 78323933. The next prime is 78323953. The reversal of 78323947 is 74932387.

It is a cyclic number.

It is not a de Polignac number, because 78323947 - 2²³ = 69935339 is a prime.

It is a super-2 number, since 2×78323947² = 12269281347317618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78323447) 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 31 ways as a sum of consecutive naturals, for example, 96172 + ... + 96982.

It is an arithmetic number, because the mean of its divisors is an integer number (3069360).

Almost surely, 2^78323947 is an apocalyptic number.

78323947 is a deficient number, since it is larger than the sum of its proper divisors (19895573).

78323947 is a wasteful number, since it uses less digits than its factorization.

78323947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883.

The product of its digits is 254016, while the sum is 43.

The square root of 78323947 is about 8850.0817510348. The cubic root of 78323947 is about 427.8565533055.

The spelling of 78323947 in words is "seventy-eight million, three hundred twenty-three thousand, nine hundred forty-seven".