81497941 has 16 divisors (see below), whose sum is σ = 95831424. Its totient is φ = 67863744.

The previous prime is 81497921. The next prime is 81497957. The reversal of 81497941 is 14979418.

It is not a de Polignac number, because 81497941 - 2⁵ = 81497909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81497921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38671 + ... + 40723.

It is an arithmetic number, because the mean of its divisors is an integer number (5989464).

Almost surely, 2^81497941 is an apocalyptic number.

It is an amenable number.

81497941 is a deficient number, since it is larger than the sum of its proper divisors (14333483).

81497941 is a wasteful number, since it uses less digits than its factorization.

81497941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220.

The product of its digits is 72576, while the sum is 43.

The square root of 81497941 is about 9027.6210044507. The cubic root of 81497941 is about 433.5596718307.

The spelling of 81497941 in words is "eighty-one million, four hundred ninety-seven thousand, nine hundred forty-one".