81314753 has 8 divisors (see below), whose sum is σ = 90589800. Its totient is φ = 72471168.

The previous prime is 81314749. The next prime is 81314771. The reversal of 81314753 is 35741318.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 81306289 = 92^2 + 9017^2 .

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 81314753 - 2² = 81314749 is a prime.

It is a super-2 number, since 2×81314753² = 13224178110902018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81304753) 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, 107468 + ... + 108221.

It is an arithmetic number, because the mean of its divisors is an integer number (11323725).

Almost surely, 2^81314753 is an apocalyptic number.

It is an amenable number.

81314753 is a deficient number, since it is larger than the sum of its proper divisors (9275047).

81314753 is a wasteful number, since it uses less digits than its factorization.

81314753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215731.

The product of its digits is 10080, while the sum is 32.

The square root of 81314753 is about 9017.4693234854. The cubic root of 81314753 is about 433.2345817709.

The spelling of 81314753 in words is "eighty-one million, three hundred fourteen thousand, seven hundred fifty-three".