79146421 has 2 divisors, whose sum is σ = 79146422. Its totient is φ = 79146420.

The previous prime is 79146391. The next prime is 79146451. The reversal of 79146421 is 12464197.

It is a balanced prime because it is at equal distance from previous prime (79146391) and next prime (79146451).

It can be written as a sum of positive squares in only one way, i.e., 66994225 + 12152196 = 8185^2 + 3486^2 .

It is an emirp because it is prime and its reverse (12464197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79146421 - 2⁹ = 79145909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79146451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39573210 + 39573211.

It is an arithmetic number, because the mean of its divisors is an integer number (39573211).

Almost surely, 2^79146421 is an apocalyptic number.

It is an amenable number.

79146421 is a deficient number, since it is larger than the sum of its proper divisors (1).

79146421 is an equidigital number, since it uses as much as digits as its factorization.

79146421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 79146421 is about 8896.4274290301. The cubic root of 79146421 is about 429.3489715610.

The spelling of 79146421 in words is "seventy-nine million, one hundred forty-six thousand, four hundred twenty-one".