78756133 has 2 divisors, whose sum is σ = 78756134. Its totient is φ = 78756132.

The previous prime is 78756131. The next prime is 78756187. The reversal of 78756133 is 33165787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75307684 + 3448449 = 8678^2 + 1857^2 .

It is a cyclic number.

It is not a de Polignac number, because 78756133 - 2¹ = 78756131 is a prime.

It is a super-2 number, since 2×78756133² = 12405056970227378, which contains 22 as substring.

Together with 78756131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78756131) 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 as a sum of consecutive naturals, namely, 39378066 + 39378067.

It is an arithmetic number, because the mean of its divisors is an integer number (39378067).

Almost surely, 2^78756133 is an apocalyptic number.

It is an amenable number.

78756133 is a deficient number, since it is larger than the sum of its proper divisors (1).

78756133 is an equidigital number, since it uses as much as digits as its factorization.

78756133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 78756133 is about 8874.4652233247. The cubic root of 78756133 is about 428.6420709954.

The spelling of 78756133 in words is "seventy-eight million, seven hundred fifty-six thousand, one hundred thirty-three".