38971843 has 2 divisors, whose sum is σ = 38971844. Its totient is φ = 38971842.

The previous prime is 38971817. The next prime is 38971859. The reversal of 38971843 is 34817983.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38971843 - 2⁵ = 38971811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38971843.

It is not a weakly prime, because it can be changed into another prime (38971043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19485921 + 19485922.

It is an arithmetic number, because the mean of its divisors is an integer number (19485922).

Almost surely, 2^38971843 is an apocalyptic number.

38971843 is a deficient number, since it is larger than the sum of its proper divisors (1).

38971843 is an equidigital number, since it uses as much as digits as its factorization.

38971843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 38971843 is about 6242.7432271398. The cubic root of 38971843 is about 339.0395123960.

The spelling of 38971843 in words is "thirty-eight million, nine hundred seventy-one thousand, eight hundred forty-three".