81617114 has 8 divisors (see below), whose sum is σ = 122466708. Its totient is φ = 40794880.

The previous prime is 81617113. The next prime is 81617131. The reversal of 81617114 is 41171618.

It can be written as a sum of positive squares in 2 ways, for example, as 77880625 + 3736489 = 8825^2 + 1933^2 .

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

It is a super-2 number, since 2×81617114² = 13322706595377992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81617113) 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, 4154 + ... + 13434.

Almost surely, 2^81617114 is an apocalyptic number.

81617114 is a deficient number, since it is larger than the sum of its proper divisors (40849594).

81617114 is a wasteful number, since it uses less digits than its factorization.

81617114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13680.

The product of its digits is 1344, while the sum is 29.

The square root of 81617114 is about 9034.2190586680. The cubic root of 81617114 is about 433.7708977909.

The spelling of 81617114 in words is "eighty-one million, six hundred seventeen thousand, one hundred fourteen".