78275039 has 2 divisors, whose sum is σ = 78275040. Its totient is φ = 78275038.

The previous prime is 78275033. The next prime is 78275051. The reversal of 78275039 is 93057287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78275039 - 2¹² = 78270943 is a prime.

It is a super-2 number, since 2×78275039² = 12253963460903042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78274987 and 78275005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78275033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39137519 + 39137520.

It is an arithmetic number, because the mean of its divisors is an integer number (39137520).

Almost surely, 2^78275039 is an apocalyptic number.

78275039 is a deficient number, since it is larger than the sum of its proper divisors (1).

78275039 is an equidigital number, since it uses as much as digits as its factorization.

78275039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 78275039 is about 8847.3181812344. The cubic root of 78275039 is about 427.7674789497.

The spelling of 78275039 in words is "seventy-eight million, two hundred seventy-five thousand, thirty-nine".