78633259 has 2 divisors, whose sum is σ = 78633260. Its totient is φ = 78633258.

The previous prime is 78633257. The next prime is 78633301. The reversal of 78633259 is 95233687.

It is a weak prime.

It is an emirp because it is prime and its reverse (95233687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78633259 - 2¹ = 78633257 is a prime.

It is a super-2 number, since 2×78633259² = 12366378841922162, which contains 22 as substring.

Together with 78633257, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78633257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39316629 + 39316630.

It is an arithmetic number, because the mean of its divisors is an integer number (39316630).

Almost surely, 2^78633259 is an apocalyptic number.

78633259 is a deficient number, since it is larger than the sum of its proper divisors (1).

78633259 is an equidigital number, since it uses as much as digits as its factorization.

78633259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 78633259 is about 8867.5396249467. The cubic root of 78633259 is about 428.4190349021.

The spelling of 78633259 in words is "seventy-eight million, six hundred thirty-three thousand, two hundred fifty-nine".