78995573 has 2 divisors, whose sum is σ = 78995574. Its totient is φ = 78995572.

The previous prime is 78995537. The next prime is 78995603. The reversal of 78995573 is 37559987.

It is a happy number.

Together with previous prime (78995537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61748164 + 17247409 = 7858^2 + 4153^2 .

It is a cyclic number.

It is not a de Polignac number, because 78995573 - 2¹⁴ = 78979189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78995173) 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, 39497786 + 39497787.

It is an arithmetic number, because the mean of its divisors is an integer number (39497787).

Almost surely, 2^78995573 is an apocalyptic number.

It is an amenable number.

78995573 is a deficient number, since it is larger than the sum of its proper divisors (1).

78995573 is an equidigital number, since it uses as much as digits as its factorization.

78995573 is an odious number, because the sum of its binary digits is odd.

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

The square root of 78995573 is about 8887.9453756197. The cubic root of 78995573 is about 429.0760275527.

The spelling of 78995573 in words is "seventy-eight million, nine hundred ninety-five thousand, five hundred seventy-three".