81348097 has 4 divisors (see below), whose sum is σ = 81797716. Its totient is φ = 80898480.

The previous prime is 81348083. The next prime is 81348151. The reversal of 81348097 is 79084318.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3837681 + 77510416 = 1959^2 + 8804^2 .

It is a cyclic number.

It is not a de Polignac number, because 81348097 - 2⁷ = 81347969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81358097) 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, 224538 + ... + 224899.

It is an arithmetic number, because the mean of its divisors is an integer number (20449429).

Almost surely, 2^81348097 is an apocalyptic number.

It is an amenable number.

81348097 is a deficient number, since it is larger than the sum of its proper divisors (449619).

81348097 is a wasteful number, since it uses less digits than its factorization.

81348097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449618.

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

The square root of 81348097 is about 9019.3179897374. The cubic root of 81348097 is about 433.2937911979.

The spelling of 81348097 in words is "eighty-one million, three hundred forty-eight thousand, ninety-seven".