81960107 has 8 divisors (see below), whose sum is σ = 85913520. Its totient is φ = 78099840.

The previous prime is 81960103. The next prime is 81960139. The reversal of 81960107 is 70106918.

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 81960107 - 2² = 81960103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81960103) 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, 21482 + ... + 25007.

It is an arithmetic number, because the mean of its divisors is an integer number (10739190).

Almost surely, 2^81960107 is an apocalyptic number.

81960107 is a deficient number, since it is larger than the sum of its proper divisors (3953413).

81960107 is a wasteful number, since it uses less digits than its factorization.

81960107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46573.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 81960107 is about 9053.1821477313. The cubic root of 81960107 is about 434.3776841405.

The spelling of 81960107 in words is "eighty-one million, nine hundred sixty thousand, one hundred seven".