79421941 has 2 divisors, whose sum is σ = 79421942. Its totient is φ = 79421940.

The previous prime is 79421933. The next prime is 79421971. The reversal of 79421941 is 14912497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68392900 + 11029041 = 8270^2 + 3321^2 .

It is a cyclic number.

It is not a de Polignac number, because 79421941 - 2³ = 79421933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79421941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79421911) 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, 39710970 + 39710971.

It is an arithmetic number, because the mean of its divisors is an integer number (39710971).

Almost surely, 2^79421941 is an apocalyptic number.

It is an amenable number.

79421941 is a deficient number, since it is larger than the sum of its proper divisors (1).

79421941 is an equidigital number, since it uses as much as digits as its factorization.

79421941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 79421941 is about 8911.8988436808. The cubic root of 79421941 is about 429.8466029368.

The spelling of 79421941 in words is "seventy-nine million, four hundred twenty-one thousand, nine hundred forty-one".