81960122 has 4 divisors (see below), whose sum is σ = 122940186. Its totient is φ = 40980060.

The previous prime is 81960103. The next prime is 81960139. The reversal of 81960122 is 22106918.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 80982001 + 978121 = 8999^2 + 989^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20490029 + ... + 20490032.

Almost surely, 2^81960122 is an apocalyptic number.

81960122 is a deficient number, since it is larger than the sum of its proper divisors (40980064).

81960122 is a wasteful number, since it uses less digits than its factorization.

81960122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40980063.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 81960122 is about 9053.1829761692. The cubic root of 81960122 is about 434.3777106399.

The spelling of 81960122 in words is "eighty-one million, nine hundred sixty thousand, one hundred twenty-two".