81404097 has 8 divisors (see below), whose sum is σ = 108589920. Its totient is φ = 54243840.

The previous prime is 81404027. The next prime is 81404111. The reversal of 81404097 is 79040418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81404097 - 2¹⁰ = 81403073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81404027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3022 + ... + 13112.

It is an arithmetic number, because the mean of its divisors is an integer number (13573740).

Almost surely, 2^81404097 is an apocalyptic number.

It is an amenable number.

81404097 is a deficient number, since it is larger than the sum of its proper divisors (27185823).

81404097 is a wasteful number, since it uses less digits than its factorization.

81404097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12783.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 81404097 is about 9022.4219032364. The cubic root of 81404097 is about 433.3931948203.

The spelling of 81404097 in words is "eighty-one million, four hundred four thousand, ninety-seven".