39939269 has 2 divisors, whose sum is σ = 39939270. Its totient is φ = 39939268.

The previous prime is 39939233. The next prime is 39939271. The reversal of 39939269 is 96293993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 2362369 = 6130^2 + 1537^2 .

It is an emirp because it is prime and its reverse (96293993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39939269 - 2⁸ = 39939013 is a prime.

It is a super-2 number, since 2×39939269² = 3190290416508722, which contains 22 as substring.

Together with 39939271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39939209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19969634 + 19969635.

It is an arithmetic number, because the mean of its divisors is an integer number (19969635).

Almost surely, 2^39939269 is an apocalyptic number.

It is an amenable number.

39939269 is a deficient number, since it is larger than the sum of its proper divisors (1).

39939269 is an equidigital number, since it uses as much as digits as its factorization.

39939269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 708588, while the sum is 50.

The square root of 39939269 is about 6319.7522894493. The cubic root of 39939269 is about 341.8220207512.

The spelling of 39939269 in words is "thirty-nine million, nine hundred thirty-nine thousand, two hundred sixty-nine".