81960467 has 8 divisors (see below), whose sum is σ = 84952800. Its totient is φ = 78979264.

The previous prime is 81960449. The next prime is 81960469. The reversal of 81960467 is 76406918.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81960467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81960469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14018 + ... + 18984.

It is an arithmetic number, because the mean of its divisors is an integer number (10619100).

Almost surely, 2^81960467 is an apocalyptic number.

81960467 is a deficient number, since it is larger than the sum of its proper divisors (2992333).

81960467 is a wasteful number, since it uses less digits than its factorization.

81960467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 81960467 is about 9053.2020302211. The cubic root of 81960467 is about 434.3783201237.

The spelling of 81960467 in words is "eighty-one million, nine hundred sixty thousand, four hundred sixty-seven".