78450269 has 2 divisors, whose sum is σ = 78450270. Its totient is φ = 78450268.

The previous prime is 78450247. The next prime is 78450271. The reversal of 78450269 is 96205487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49182169 + 29268100 = 7013^2 + 5410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78450269 is a prime.

It is a super-2 number, since 2×78450269² = 12308889412344722, which contains 22 as substring.

Together with 78450271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78450289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39225134 + 39225135.

It is an arithmetic number, because the mean of its divisors is an integer number (39225135).

Almost surely, 2^78450269 is an apocalyptic number.

It is an amenable number.

78450269 is a deficient number, since it is larger than the sum of its proper divisors (1).

78450269 is an equidigital number, since it uses as much as digits as its factorization.

78450269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 78450269 is about 8857.2156460143. The cubic root of 78450269 is about 428.0864475132.

The spelling of 78450269 in words is "seventy-eight million, four hundred fifty thousand, two hundred sixty-nine".