40339591 has 2 divisors, whose sum is σ = 40339592. Its totient is φ = 40339590.

The previous prime is 40339571. The next prime is 40339627. The reversal of 40339591 is 19593304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40339591 - 2¹³ = 40331399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40339511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20169795 + 20169796.

It is an arithmetic number, because the mean of its divisors is an integer number (20169796).

Almost surely, 2^40339591 is an apocalyptic number.

40339591 is a deficient number, since it is larger than the sum of its proper divisors (1).

40339591 is an equidigital number, since it uses as much as digits as its factorization.

40339591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 40339591 is about 6351.3456054603. The cubic root of 40339591 is about 342.9602840567.

The spelling of 40339591 in words is "forty million, three hundred thirty-nine thousand, five hundred ninety-one".