78043741 has 2 divisors, whose sum is σ = 78043742. Its totient is φ = 78043740.

The previous prime is 78043739. The next prime is 78043747. The reversal of 78043741 is 14734087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 22838841 = 7430^2 + 4779^2 .

It is a cyclic number.

It is not a de Polignac number, because 78043741 - 2¹ = 78043739 is a prime.

Together with 78043739, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 78043697 and 78043706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78043747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39021870 + 39021871.

It is an arithmetic number, because the mean of its divisors is an integer number (39021871).

Almost surely, 2^78043741 is an apocalyptic number.

It is an amenable number.

78043741 is a deficient number, since it is larger than the sum of its proper divisors (1).

78043741 is an equidigital number, since it uses as much as digits as its factorization.

78043741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 78043741 is about 8834.2368657400. The cubic root of 78043741 is about 427.3457209217.

It can be divided in two parts, 780 and 43741, that added together give a square (44521 = 211²).

The spelling of 78043741 in words is "seventy-eight million, forty-three thousand, seven hundred forty-one".