38540731 has 2 divisors, whose sum is σ = 38540732. Its totient is φ = 38540730.

The previous prime is 38540707. The next prime is 38540743. The reversal of 38540731 is 13704583.

38540731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13704583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38540731 - 2⁷ = 38540603 is a prime.

It is a super-2 number, since 2×38540731² = 2970775892028722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38540693 and 38540702.

It is not a weakly prime, because it can be changed into another prime (38540701) 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, 19270365 + 19270366.

It is an arithmetic number, because the mean of its divisors is an integer number (19270366).

Almost surely, 2^38540731 is an apocalyptic number.

38540731 is a deficient number, since it is larger than the sum of its proper divisors (1).

38540731 is an equidigital number, since it uses as much as digits as its factorization.

38540731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 38540731 is about 6208.1181528705. The cubic root of 38540731 is about 337.7847064463.

The spelling of 38540731 in words is "thirty-eight million, five hundred forty thousand, seven hundred thirty-one".