78389033 has 2 divisors, whose sum is σ = 78389034. Its totient is φ = 78389032.

The previous prime is 78389027. The next prime is 78389039. The reversal of 78389033 is 33098387.

It is a balanced prime because it is at equal distance from previous prime (78389027) and next prime (78389039).

It can be written as a sum of positive squares in only one way, i.e., 51380224 + 27008809 = 7168^2 + 5197^2 .

It is a cyclic number.

It is not a de Polignac number, because 78389033 - 2⁶ = 78388969 is a prime.

It is a super-2 number, since 2×78389033² = 12289680989350178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78389039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39194516 + 39194517.

It is an arithmetic number, because the mean of its divisors is an integer number (39194517).

Almost surely, 2^78389033 is an apocalyptic number.

It is an amenable number.

78389033 is a deficient number, since it is larger than the sum of its proper divisors (1).

78389033 is an equidigital number, since it uses as much as digits as its factorization.

78389033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 78389033 is about 8853.7581286141. The cubic root of 78389033 is about 427.9750345731.

The spelling of 78389033 in words is "seventy-eight million, three hundred eighty-nine thousand, thirty-three".