39075981 has 24 divisors (see below), whose sum is σ = 60914304. Its totient is φ = 22216320.

The previous prime is 39075977. The next prime is 39075983. The reversal of 39075981 is 18957093.

It is a happy number.

It is not a de Polignac number, because 39075981 - 2² = 39075977 is a prime.

It is a super-2 number, since 2×39075981² = 3053864582224722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39075983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34876 + ... + 35978.

It is an arithmetic number, because the mean of its divisors is an integer number (2538096).

Almost surely, 2^39075981 is an apocalyptic number.

It is an amenable number.

39075981 is a deficient number, since it is larger than the sum of its proper divisors (21838323).

39075981 is a wasteful number, since it uses less digits than its factorization.

39075981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 39075981 is about 6251.0783869665. The cubic root of 39075981 is about 339.3412301865.

The spelling of 39075981 in words is "thirty-nine million, seventy-five thousand, nine hundred eighty-one".