78195329 has 2 divisors, whose sum is σ = 78195330. Its totient is φ = 78195328.

The previous prime is 78195287. The next prime is 78195367. The reversal of 78195329 is 92359187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 49729 = 8840^2 + 223^2 .

It is an emirp because it is prime and its reverse (92359187) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78195329 is a prime.

It is a super-2 number, since 2×78195329² = 12229018954836482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78195329.

It is not a weakly prime, because it can be changed into another prime (78192329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39097664 + 39097665.

It is an arithmetic number, because the mean of its divisors is an integer number (39097665).

Almost surely, 2^78195329 is an apocalyptic number.

It is an amenable number.

78195329 is a deficient number, since it is larger than the sum of its proper divisors (1).

78195329 is an equidigital number, since it uses as much as digits as its factorization.

78195329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 78195329 is about 8842.8122789077. The cubic root of 78195329 is about 427.6222264875.

The spelling of 78195329 in words is "seventy-eight million, one hundred ninety-five thousand, three hundred twenty-nine".