78836269 has 2 divisors, whose sum is σ = 78836270. Its totient is φ = 78836268.

The previous prime is 78836231. The next prime is 78836299. The reversal of 78836269 is 96263887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70056900 + 8779369 = 8370^2 + 2963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78836269 is a prime.

It is a super-2 number, since 2×78836269² = 12430314619680722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78836299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39418134 + 39418135.

It is an arithmetic number, because the mean of its divisors is an integer number (39418135).

Almost surely, 2^78836269 is an apocalyptic number.

It is an amenable number.

78836269 is a deficient number, since it is larger than the sum of its proper divisors (1).

78836269 is an equidigital number, since it uses as much as digits as its factorization.

78836269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 78836269 is about 8878.9790516703. The cubic root of 78836269 is about 428.7874057809.

The spelling of 78836269 in words is "seventy-eight million, eight hundred thirty-six thousand, two hundred sixty-nine".