78741629 has 2 divisors, whose sum is σ = 78741630. Its totient is φ = 78741628.

The previous prime is 78741617. The next prime is 78741647. The reversal of 78741629 is 92614787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59644729 + 19096900 = 7723^2 + 4370^2 .

It is an emirp because it is prime and its reverse (92614787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78741629 - 2²⁰ = 77693053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78741629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78741659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39370814 + 39370815.

It is an arithmetic number, because the mean of its divisors is an integer number (39370815).

Almost surely, 2^78741629 is an apocalyptic number.

It is an amenable number.

78741629 is a deficient number, since it is larger than the sum of its proper divisors (1).

78741629 is an equidigital number, since it uses as much as digits as its factorization.

78741629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 78741629 is about 8873.6480096970. The cubic root of 78741629 is about 428.6157559812.

The spelling of 78741629 in words is "seventy-eight million, seven hundred forty-one thousand, six hundred twenty-nine".