81463941 has 16 divisors (see below), whose sum is σ = 129971520. Its totient is φ = 50131440.

The previous prime is 81463933. The next prime is 81463951. The reversal of 81463941 is 14936418.

81463941 is a `hidden beast` number, since 8 + 14 + 639 + 4 + 1 = 666.

It is not a de Polignac number, because 81463941 - 2³ = 81463933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81463896 and 81463905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81463951) 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, 115695 + ... + 116396.

It is an arithmetic number, because the mean of its divisors is an integer number (8123220).

Almost surely, 2^81463941 is an apocalyptic number.

It is an amenable number.

81463941 is a deficient number, since it is larger than the sum of its proper divisors (48507579).

81463941 is a wasteful number, since it uses less digits than its factorization.

81463941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232113 (or 232107 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 81463941 is about 9025.7376983823. The cubic root of 81463941 is about 433.4993714147.

The spelling of 81463941 in words is "eighty-one million, four hundred sixty-three thousand, nine hundred forty-one".