78759953 has 2 divisors, whose sum is σ = 78759954. Its totient is φ = 78759952.

The previous prime is 78759943. The next prime is 78759971. The reversal of 78759953 is 35995787.

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., 74787904 + 3972049 = 8648^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 78759953 - 2⁴ = 78759937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78759895 and 78759904.

It is not a weakly prime, because it can be changed into another prime (78759943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39379976 + 39379977.

It is an arithmetic number, because the mean of its divisors is an integer number (39379977).

Almost surely, 2^78759953 is an apocalyptic number.

It is an amenable number.

78759953 is a deficient number, since it is larger than the sum of its proper divisors (1).

78759953 is an equidigital number, since it uses as much as digits as its factorization.

78759953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 53.

The square root of 78759953 is about 8874.6804449512. The cubic root of 78759953 is about 428.6490011911.

The spelling of 78759953 in words is "seventy-eight million, seven hundred fifty-nine thousand, nine hundred fifty-three".