81122627 has 2 divisors, whose sum is σ = 81122628. Its totient is φ = 81122626.

The previous prime is 81122557. The next prime is 81122653. The reversal of 81122627 is 72622118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81122627 - 2²⁰ = 80074051 is a prime.

It is a super-2 number, since 2×81122627² = 13161761222762258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81122627.

It is not a weakly prime, because it can be changed into another prime (81122687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40561313 + 40561314.

It is an arithmetic number, because the mean of its divisors is an integer number (40561314).

Almost surely, 2^81122627 is an apocalyptic number.

81122627 is a deficient number, since it is larger than the sum of its proper divisors (1).

81122627 is an equidigital number, since it uses as much as digits as its factorization.

81122627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 81122627 is about 9006.8100346349. The cubic root of 81122627 is about 432.8931051212.

The spelling of 81122627 in words is "eighty-one million, one hundred twenty-two thousand, six hundred twenty-seven".