78653233 has 2 divisors, whose sum is σ = 78653234. Its totient is φ = 78653232.

The previous prime is 78653221. The next prime is 78653251. The reversal of 78653233 is 33235687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42928704 + 35724529 = 6552^2 + 5977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78653233 is a prime.

It is a super-2 number, since 2×78653233² = 12372662122704578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78653192 and 78653201.

It is not a weakly prime, because it can be changed into another prime (78653273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39326616 + 39326617.

It is an arithmetic number, because the mean of its divisors is an integer number (39326617).

Almost surely, 2^78653233 is an apocalyptic number.

It is an amenable number.

78653233 is a deficient number, since it is larger than the sum of its proper divisors (1).

78653233 is an equidigital number, since it uses as much as digits as its factorization.

78653233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 78653233 is about 8868.6657959357. The cubic root of 78653233 is about 428.4553067353.

The spelling of 78653233 in words is "seventy-eight million, six hundred fifty-three thousand, two hundred thirty-three".