81034979 has 2 divisors, whose sum is σ = 81034980. Its totient is φ = 81034978.

The previous prime is 81034973. The next prime is 81035011. The reversal of 81034979 is 97943018.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81034979 - 2⁴ = 81034963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81034973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40517489 + 40517490.

It is an arithmetic number, because the mean of its divisors is an integer number (40517490).

Almost surely, 2^81034979 is an apocalyptic number.

81034979 is a deficient number, since it is larger than the sum of its proper divisors (1).

81034979 is an equidigital number, since it uses as much as digits as its factorization.

81034979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 81034979 is about 9001.9430680270. The cubic root of 81034979 is about 432.7371441633.

The spelling of 81034979 in words is "eighty-one million, thirty-four thousand, nine hundred seventy-nine".