79800043 has 2 divisors, whose sum is σ = 79800044. Its totient is φ = 79800042.

The previous prime is 79800029. The next prime is 79800047. The reversal of 79800043 is 34000897.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79800043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79799978 and 79800014.

It is not a weakly prime, because it can be changed into another prime (79800047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39900021 + 39900022.

It is an arithmetic number, because the mean of its divisors is an integer number (39900022).

Almost surely, 2^79800043 is an apocalyptic number.

79800043 is a deficient number, since it is larger than the sum of its proper divisors (1).

79800043 is an equidigital number, since it uses as much as digits as its factorization.

79800043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 79800043 is about 8933.0869804340. The cubic root of 79800043 is about 430.5276432442.

The spelling of 79800043 in words is "seventy-nine million, eight hundred thousand, forty-three".