38128901 has 2 divisors, whose sum is σ = 38128902. Its totient is φ = 38128900.

The previous prime is 38128897. The next prime is 38128903. The reversal of 38128901 is 10982183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31651876 + 6477025 = 5626^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 38128901 - 2² = 38128897 is a prime.

It is a Sophie Germain prime.

Together with 38128903, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38128903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19064450 + 19064451.

It is an arithmetic number, because the mean of its divisors is an integer number (19064451).

Almost surely, 2^38128901 is an apocalyptic number.

It is an amenable number.

38128901 is a deficient number, since it is larger than the sum of its proper divisors (1).

38128901 is an equidigital number, since it uses as much as digits as its factorization.

38128901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 38128901 is about 6174.8604032804. The cubic root of 38128901 is about 336.5772537556.

The spelling of 38128901 in words is "thirty-eight million, one hundred twenty-eight thousand, nine hundred one".