79278413 has 2 divisors, whose sum is σ = 79278414. Its totient is φ = 79278412.

The previous prime is 79278371. The next prime is 79278443. The reversal of 79278413 is 31487297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70593604 + 8684809 = 8402^2 + 2947^2 .

It is a cyclic number.

It is not a de Polignac number, because 79278413 - 2⁶ = 79278349 is a prime.

It is a Chen prime.

It is equal to p_4629767 and since 79278413 and 4629767 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79278443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39639206 + 39639207.

It is an arithmetic number, because the mean of its divisors is an integer number (39639207).

Almost surely, 2^79278413 is an apocalyptic number.

It is an amenable number.

79278413 is a deficient number, since it is larger than the sum of its proper divisors (1).

79278413 is an equidigital number, since it uses as much as digits as its factorization.

79278413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 79278413 is about 8903.8425974407. The cubic root of 79278413 is about 429.5875132192.

The spelling of 79278413 in words is "seventy-nine million, two hundred seventy-eight thousand, four hundred thirteen".