39242591 has 2 divisors, whose sum is σ = 39242592. Its totient is φ = 39242590.

The previous prime is 39242587. The next prime is 39242627. The reversal of 39242591 is 19524293.

It is a weak prime.

It is an emirp because it is prime and its reverse (19524293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39242591 - 2² = 39242587 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39242501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19621295 + 19621296.

It is an arithmetic number, because the mean of its divisors is an integer number (19621296).

Almost surely, 2^39242591 is an apocalyptic number.

39242591 is a deficient number, since it is larger than the sum of its proper divisors (1).

39242591 is an equidigital number, since it uses as much as digits as its factorization.

39242591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 39242591 is about 6264.3907125913. The cubic root of 39242591 is about 339.8228344584.

The spelling of 39242591 in words is "thirty-nine million, two hundred forty-two thousand, five hundred ninety-one".