78120233 has 2 divisors, whose sum is σ = 78120234. Its totient is φ = 78120232.

The previous prime is 78120197. The next prime is 78120239. The reversal of 78120233 is 33202187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77915929 + 204304 = 8827^2 + 452^2 .

It is a cyclic number.

It is not a de Polignac number, because 78120233 - 2¹⁸ = 77858089 is a prime.

It is a super-2 number, since 2×78120233² = 12205541607948578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78120239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39060116 + 39060117.

It is an arithmetic number, because the mean of its divisors is an integer number (39060117).

Almost surely, 2^78120233 is an apocalyptic number.

It is an amenable number.

78120233 is a deficient number, since it is larger than the sum of its proper divisors (1).

78120233 is an equidigital number, since it uses as much as digits as its factorization.

78120233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 78120233 is about 8838.5650984761. The cubic root of 78120233 is about 427.4852916066.

The spelling of 78120233 in words is "seventy-eight million, one hundred twenty thousand, two hundred thirty-three".