79421983 has 2 divisors, whose sum is σ = 79421984. Its totient is φ = 79421982.

The previous prime is 79421971. The next prime is 79421987. The reversal of 79421983 is 38912497.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79421983 - 2¹³ = 79413791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79421987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39710991 + 39710992.

It is an arithmetic number, because the mean of its divisors is an integer number (39710992).

Almost surely, 2^79421983 is an apocalyptic number.

79421983 is a deficient number, since it is larger than the sum of its proper divisors (1).

79421983 is an equidigital number, since it uses as much as digits as its factorization.

79421983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 79421983 is about 8911.9012000807. The cubic root of 79421983 is about 429.8466787075.

The spelling of 79421983 in words is "seventy-nine million, four hundred twenty-one thousand, nine hundred eighty-three".