78945953 has 8 divisors (see below), whose sum is σ = 80786400. Its totient is φ = 77122368.

The previous prime is 78945949. The next prime is 78945961. The reversal of 78945953 is 35954987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78945953 - 2² = 78945949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78945973) 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 7 ways as a sum of consecutive naturals, for example, 5513 + ... + 13721.

It is an arithmetic number, because the mean of its divisors is an integer number (10098300).

Almost surely, 2^78945953 is an apocalyptic number.

It is an amenable number.

78945953 is a deficient number, since it is larger than the sum of its proper divisors (1840447).

78945953 is a wasteful number, since it uses less digits than its factorization.

78945953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8431.

The product of its digits is 1360800, while the sum is 50.

The square root of 78945953 is about 8885.1535158375. The cubic root of 78945953 is about 428.9861693025.

The spelling of 78945953 in words is "seventy-eight million, nine hundred forty-five thousand, nine hundred fifty-three".