38897238409 has 2 divisors, whose sum is σ = 38897238410. Its totient is φ = 38897238408.

The previous prime is 38897238343. The next prime is 38897238461. The reversal of 38897238409 is 90483279883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38885868025 + 11370384 = 197195^2 + 3372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38897238409 is a prime.

It is not a weakly prime, because it can be changed into another prime (38897238469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19448619204 + 19448619205.

It is an arithmetic number, because the mean of its divisors is an integer number (19448619205).

Almost surely, 2^38897238409 is an apocalyptic number.

It is an amenable number.

38897238409 is a deficient number, since it is larger than the sum of its proper divisors (1).

38897238409 is an equidigital number, since it uses as much as digits as its factorization.

38897238409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 38897238409 in words is "thirty-eight billion, eight hundred ninety-seven million, two hundred thirty-eight thousand, four hundred nine".