38997887 has 2 divisors, whose sum is σ = 38997888. Its totient is φ = 38997886.

The previous prime is 38997853. The next prime is 38997901. The reversal of 38997887 is 78879983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38997887 - 2⁸ = 38997631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38993887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19498943 + 19498944.

It is an arithmetic number, because the mean of its divisors is an integer number (19498944).

Almost surely, 2^38997887 is an apocalyptic number.

38997887 is a deficient number, since it is larger than the sum of its proper divisors (1).

38997887 is an equidigital number, since it uses as much as digits as its factorization.

38997887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 59.

The square root of 38997887 is about 6244.8288207124. The cubic root of 38997887 is about 339.1150197209.

The spelling of 38997887 in words is "thirty-eight million, nine hundred ninety-seven thousand, eight hundred eighty-seven".