81114907 has 4 divisors (see below), whose sum is σ = 81414496. Its totient is φ = 80815320.

The previous prime is 81114893. The next prime is 81114919. The reversal of 81114907 is 70941118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70941118 = 2 ⋅35470559.

It is a cyclic number.

It is not a de Polignac number, because 81114907 - 2⁷ = 81114779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81114967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149388 + ... + 149929.

It is an arithmetic number, because the mean of its divisors is an integer number (20353624).

Almost surely, 2^81114907 is an apocalyptic number.

81114907 is a deficient number, since it is larger than the sum of its proper divisors (299589).

81114907 is a wasteful number, since it uses less digits than its factorization.

81114907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299588.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 81114907 is about 9006.3814598317. The cubic root of 81114907 is about 432.8793726566.

The spelling of 81114907 in words is "eighty-one million, one hundred fourteen thousand, nine hundred seven".