39059981 has 4 divisors (see below), whose sum is σ = 39275964. Its totient is φ = 38844000.

The previous prime is 39059963. The next prime is 39059987. The reversal of 39059981 is 18995093.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9357481 + 29702500 = 3059^2 + 5450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39059981 is a prime.

It is a super-2 number, since 2×39059981² = 3051364231440722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39059987) 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, 107720 + ... + 108081.

It is an arithmetic number, because the mean of its divisors is an integer number (9818991).

Almost surely, 2^39059981 is an apocalyptic number.

It is an amenable number.

39059981 is a deficient number, since it is larger than the sum of its proper divisors (215983).

39059981 is a wasteful number, since it uses less digits than its factorization.

39059981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215982.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 39059981 is about 6249.7984767511. The cubic root of 39059981 is about 339.2949084584.

The spelling of 39059981 in words is "thirty-nine million, fifty-nine thousand, nine hundred eighty-one".