38947807 has 2 divisors, whose sum is σ = 38947808. Its totient is φ = 38947806.

The previous prime is 38947789. The next prime is 38947817. The reversal of 38947807 is 70874983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38947807 - 2¹⁵ = 38915039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38947817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19473903 + 19473904.

It is an arithmetic number, because the mean of its divisors is an integer number (19473904).

Almost surely, 2^38947807 is an apocalyptic number.

38947807 is a deficient number, since it is larger than the sum of its proper divisors (1).

38947807 is an equidigital number, since it uses as much as digits as its factorization.

38947807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 38947807 is about 6240.8178149983. The cubic root of 38947807 is about 338.9697968526.

The spelling of 38947807 in words is "thirty-eight million, nine hundred forty-seven thousand, eight hundred seven".