78264271 has 2 divisors, whose sum is σ = 78264272. Its totient is φ = 78264270.

The previous prime is 78264253. The next prime is 78264299. The reversal of 78264271 is 17246287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78264271 - 2¹⁹ = 77739983 is a prime.

It is a super-2 number, since 2×78264271² = 12250592230322882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78264271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78264371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39132135 + 39132136.

It is an arithmetic number, because the mean of its divisors is an integer number (39132136).

Almost surely, 2^78264271 is an apocalyptic number.

78264271 is a deficient number, since it is larger than the sum of its proper divisors (1).

78264271 is an equidigital number, since it uses as much as digits as its factorization.

78264271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 78264271 is about 8846.7096143142. The cubic root of 78264271 is about 427.7478626007.

The spelling of 78264271 in words is "seventy-eight million, two hundred sixty-four thousand, two hundred seventy-one".