38540591 has 2 divisors, whose sum is σ = 38540592. Its totient is φ = 38540590.

The previous prime is 38540573. The next prime is 38540597. The reversal of 38540591 is 19504583.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38540591 - 2¹⁴ = 38524207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38540597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19270295 + 19270296.

It is an arithmetic number, because the mean of its divisors is an integer number (19270296).

Almost surely, 2^38540591 is an apocalyptic number.

38540591 is a deficient number, since it is larger than the sum of its proper divisors (1).

38540591 is an equidigital number, since it uses as much as digits as its factorization.

38540591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 38540591 is about 6208.1068773016. The cubic root of 38540591 is about 337.7842974425.

The spelling of 38540591 in words is "thirty-eight million, five hundred forty thousand, five hundred ninety-one".