78675953 has 2 divisors, whose sum is σ = 78675954. Its totient is φ = 78675952.

The previous prime is 78675937. The next prime is 78675991. The reversal of 78675953 is 35957687.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67699984 + 10975969 = 8228^2 + 3313^2 .

It is an emirp because it is prime and its reverse (35957687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78675953 - 2⁴ = 78675937 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78672953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39337976 + 39337977.

It is an arithmetic number, because the mean of its divisors is an integer number (39337977).

Almost surely, 2^78675953 is an apocalyptic number.

It is an amenable number.

78675953 is a deficient number, since it is larger than the sum of its proper divisors (1).

78675953 is an equidigital number, since it uses as much as digits as its factorization.

78675953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 50.

The square root of 78675953 is about 8869.9466176522. The cubic root of 78675953 is about 428.4965577093.

The spelling of 78675953 in words is "seventy-eight million, six hundred seventy-five thousand, nine hundred fifty-three".