78836231 has 2 divisors, whose sum is σ = 78836232. Its totient is φ = 78836230.

The previous prime is 78836221. The next prime is 78836269. The reversal of 78836231 is 13263887.

It is a happy number.

It is an a-pointer prime, because the next prime (78836269) can be obtained adding 78836231 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78836231 - 2⁶ = 78836167 is a prime.

It is a super-2 number, since 2×78836231² = 12430302636570722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78836201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39418115 + 39418116.

It is an arithmetic number, because the mean of its divisors is an integer number (39418116).

Almost surely, 2^78836231 is an apocalyptic number.

78836231 is a deficient number, since it is larger than the sum of its proper divisors (1).

78836231 is an equidigital number, since it uses as much as digits as its factorization.

78836231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 78836231 is about 8878.9769117844. The cubic root of 78836231 is about 428.7873368874.

The spelling of 78836231 in words is "seventy-eight million, eight hundred thirty-six thousand, two hundred thirty-one".