81034879 has 2 divisors, whose sum is σ = 81034880. Its totient is φ = 81034878.

The previous prime is 81034861. The next prime is 81034931. The reversal of 81034879 is 97843018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81034879 - 2¹⁷ = 80903807 is a prime.

It is a super-2 number, since 2×81034879² = 13133303229089282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81034979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40517439 + 40517440.

It is an arithmetic number, because the mean of its divisors is an integer number (40517440).

Almost surely, 2^81034879 is an apocalyptic number.

81034879 is a deficient number, since it is larger than the sum of its proper divisors (1).

81034879 is an equidigital number, since it uses as much as digits as its factorization.

81034879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 81034879 is about 9001.9375136689. The cubic root of 81034879 is about 432.7369661590.

The spelling of 81034879 in words is "eighty-one million, thirty-four thousand, eight hundred seventy-nine".