81883461 has 8 divisors (see below), whose sum is σ = 119103264. Its totient is φ = 49626320.

The previous prime is 81883453. The next prime is 81883489. The reversal of 81883461 is 16438818.

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

It is a cyclic number.

It is not a de Polignac number, because 81883461 - 2³ = 81883453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81883261) 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, 1240626 + ... + 1240691.

It is an arithmetic number, because the mean of its divisors is an integer number (14887908).

Almost surely, 2^81883461 is an apocalyptic number.

It is an amenable number.

81883461 is a deficient number, since it is larger than the sum of its proper divisors (37219803).

81883461 is a wasteful number, since it uses less digits than its factorization.

81883461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481331.

The product of its digits is 36864, while the sum is 39.

The square root of 81883461 is about 9048.9480604101. The cubic root of 81883461 is about 434.2422373693.

The spelling of 81883461 in words is "eighty-one million, eight hundred eighty-three thousand, four hundred sixty-one".