78452593 has 2 divisors, whose sum is σ = 78452594. Its totient is φ = 78452592.

The previous prime is 78452579. The next prime is 78452651. The reversal of 78452593 is 39525487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78269409 + 183184 = 8847^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 78452593 - 2²¹ = 76355441 is a prime.

It is not a weakly prime, because it can be changed into another prime (78452993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39226296 + 39226297.

It is an arithmetic number, because the mean of its divisors is an integer number (39226297).

Almost surely, 2^78452593 is an apocalyptic number.

It is an amenable number.

78452593 is a deficient number, since it is larger than the sum of its proper divisors (1).

78452593 is an equidigital number, since it uses as much as digits as its factorization.

78452593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 78452593 is about 8857.3468375129. The cubic root of 78452593 is about 428.0906746629.

The spelling of 78452593 in words is "seventy-eight million, four hundred fifty-two thousand, five hundred ninety-three".