81476417 has 4 divisors (see below), whose sum is σ = 88883376. Its totient is φ = 74069460.

The previous prime is 81476407. The next prime is 81476467. The reversal of 81476417 is 71467418.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81476417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81476407) 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, 3703463 + ... + 3703484.

It is an arithmetic number, because the mean of its divisors is an integer number (22220844).

Almost surely, 2^81476417 is an apocalyptic number.

It is an amenable number.

81476417 is a deficient number, since it is larger than the sum of its proper divisors (7406959).

81476417 is a wasteful number, since it uses less digits than its factorization.

81476417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406958.

The product of its digits is 37632, while the sum is 38.

The square root of 81476417 is about 9026.4288065658. The cubic root of 81476417 is about 433.5215000687.

The spelling of 81476417 in words is "eighty-one million, four hundred seventy-six thousand, four hundred seventeen".