78020233 has 2 divisors, whose sum is σ = 78020234. Its totient is φ = 78020232.

The previous prime is 78020221. The next prime is 78020263. The reversal of 78020233 is 33202087.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73410624 + 4609609 = 8568^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 78020233 - 2¹³ = 78012041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78020198 and 78020207.

It is not a weakly prime, because it can be changed into another prime (78020203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39010116 + 39010117.

It is an arithmetic number, because the mean of its divisors is an integer number (39010117).

Almost surely, 2^78020233 is an apocalyptic number.

It is an amenable number.

78020233 is a deficient number, since it is larger than the sum of its proper divisors (1).

78020233 is an equidigital number, since it uses as much as digits as its factorization.

78020233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 78020233 is about 8832.9062601162. The cubic root of 78020233 is about 427.3028088661.

The spelling of 78020233 in words is "seventy-eight million, twenty thousand, two hundred thirty-three".