78264253 has 2 divisors, whose sum is σ = 78264254. Its totient is φ = 78264252.

The previous prime is 78264233. The next prime is 78264271. The reversal of 78264253 is 35246287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58568409 + 19695844 = 7653^2 + 4438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78264253 is a prime.

It is a super-2 number, since 2×78264253² = 12250586595296018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78264233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39132126 + 39132127.

It is an arithmetic number, because the mean of its divisors is an integer number (39132127).

Almost surely, 2^78264253 is an apocalyptic number.

It is an amenable number.

78264253 is a deficient number, since it is larger than the sum of its proper divisors (1).

78264253 is an equidigital number, since it uses as much as digits as its factorization.

78264253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 78264253 is about 8846.7085969868. The cubic root of 78264253 is about 427.7478298081.

The spelling of 78264253 in words is "seventy-eight million, two hundred sixty-four thousand, two hundred fifty-three".