78736349 has 2 divisors, whose sum is σ = 78736350. Its totient is φ = 78736348.

The previous prime is 78736331. The next prime is 78736403. The reversal of 78736349 is 94363787.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59752900 + 18983449 = 7730^2 + 4357^2 .

It is a cyclic number.

It is not a de Polignac number, because 78736349 - 2⁸ = 78736093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78736309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39368174 + 39368175.

It is an arithmetic number, because the mean of its divisors is an integer number (39368175).

Almost surely, 2^78736349 is an apocalyptic number.

It is an amenable number.

78736349 is a deficient number, since it is larger than the sum of its proper divisors (1).

78736349 is an equidigital number, since it uses as much as digits as its factorization.

78736349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

The square root of 78736349 is about 8873.3504945990. The cubic root of 78736349 is about 428.6061755267.

The spelling of 78736349 in words is "seventy-eight million, seven hundred thirty-six thousand, three hundred forty-nine".