39491269 has 2 divisors, whose sum is σ = 39491270. Its totient is φ = 39491268.

The previous prime is 39491267. The next prime is 39491297. The reversal of 39491269 is 96219493.

39491269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 13786369 = 5070^2 + 3713^2 .

It is a cyclic number.

It is not a de Polignac number, because 39491269 - 2¹ = 39491267 is a prime.

It is a super-2 number, since 2×39491269² = 3119120654460722, which contains 22 as substring.

Together with 39491267, 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 (39491267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19745634 + 19745635.

It is an arithmetic number, because the mean of its divisors is an integer number (19745635).

Almost surely, 2^39491269 is an apocalyptic number.

It is an amenable number.

39491269 is a deficient number, since it is larger than the sum of its proper divisors (1).

39491269 is an equidigital number, since it uses as much as digits as its factorization.

39491269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 39491269 is about 6284.2079055359. The cubic root of 39491269 is about 340.5391359928.

The spelling of 39491269 in words is "thirty-nine million, four hundred ninety-one thousand, two hundred sixty-nine".