39118081 has 8 divisors (see below), whose sum is σ = 40308840. Its totient is φ = 37944192.

The previous prime is 39118073. The next prime is 39118091. The reversal of 39118081 is 18081193.

It can be written as a sum of positive squares in 4 ways, for example, as 1418481 + 37699600 = 1191^2 + 6140^2 .

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 39118081 - 2³ = 39118073 is a prime.

It is a super-2 number, since 2×39118081² = 3060448522245122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39118091) 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, 571 + ... + 8863.

It is an arithmetic number, because the mean of its divisors is an integer number (5038605).

Almost surely, 2^39118081 is an apocalyptic number.

It is an amenable number.

39118081 is a deficient number, since it is larger than the sum of its proper divisors (1190759).

39118081 is an equidigital number, since it uses as much as digits as its factorization.

39118081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8435.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 39118081 is about 6254.4448994295. Note that the first 3 decimals coincide. The cubic root of 39118081 is about 339.4630538565.

The spelling of 39118081 in words is "thirty-nine million, one hundred eighteen thousand, eighty-one".