81094801 has 4 divisors (see below), whose sum is σ = 81838900. Its totient is φ = 80350704.

The previous prime is 81094799. The next prime is 81094807. The reversal of 81094801 is 10849018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10849018 = 2 ⋅5424509.

It can be written as a sum of positive squares in 2 ways, for example, as 23030401 + 58064400 = 4799^2 + 7620^2 .

It is a cyclic number.

It is not a de Polignac number, because 81094801 - 2¹ = 81094799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81094807) 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, 371886 + ... + 372103.

It is an arithmetic number, because the mean of its divisors is an integer number (20459725).

Almost surely, 2^81094801 is an apocalyptic number.

It is an amenable number.

81094801 is a deficient number, since it is larger than the sum of its proper divisors (744099).

81094801 is a wasteful number, since it uses less digits than its factorization.

81094801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744098.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 81094801 is about 9005.2651821032. The cubic root of 81094801 is about 432.8436036790.

The spelling of 81094801 in words is "eighty-one million, ninety-four thousand, eight hundred one".