38897861 has 2 divisors, whose sum is σ = 38897862. Its totient is φ = 38897860.

The previous prime is 38897857. The next prime is 38897869. The reversal of 38897861 is 16879883.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22137025 + 16760836 = 4705^2 + 4094^2 .

It is an emirp because it is prime and its reverse (16879883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38897861 - 2² = 38897857 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38897869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19448930 + 19448931.

It is an arithmetic number, because the mean of its divisors is an integer number (19448931).

Almost surely, 2^38897861 is an apocalyptic number.

It is an amenable number.

38897861 is a deficient number, since it is larger than the sum of its proper divisors (1).

38897861 is an equidigital number, since it uses as much as digits as its factorization.

38897861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 38897861 is about 6236.8149724038. The cubic root of 38897861 is about 338.8248385188.

The spelling of 38897861 in words is "thirty-eight million, eight hundred ninety-seven thousand, eight hundred sixty-one".