39930031 has 2 divisors, whose sum is σ = 39930032. Its totient is φ = 39930030.

The previous prime is 39930029. The next prime is 39930073. The reversal of 39930031 is 13003993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39930031 - 2¹ = 39930029 is a prime.

It is a super-2 number, since 2×39930031² = 3188814751321922, which contains 22 as substring.

Together with 39930029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39930931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19965015 + 19965016.

It is an arithmetic number, because the mean of its divisors is an integer number (19965016).

Almost surely, 2^39930031 is an apocalyptic number.

39930031 is the 3997-th centered pentagonal number.

39930031 is a deficient number, since it is larger than the sum of its proper divisors (1).

39930031 is an equidigital number, since it uses as much as digits as its factorization.

39930031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 39930031 is about 6319.0213641038. The cubic root of 39930031 is about 341.7956641069.

The spelling of 39930031 in words is "thirty-nine million, nine hundred thirty thousand, thirty-one".