38509481 has 2 divisors, whose sum is σ = 38509482. Its totient is φ = 38509480.

The previous prime is 38509469. The next prime is 38509487. The reversal of 38509481 is 18490583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23609881 + 14899600 = 4859^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 38509481 - 2⁶ = 38509417 is a prime.

It is a super-2 number, since 2×38509481² = 2965960253778722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38509487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19254740 + 19254741.

It is an arithmetic number, because the mean of its divisors is an integer number (19254741).

Almost surely, 2^38509481 is an apocalyptic number.

It is an amenable number.

38509481 is a deficient number, since it is larger than the sum of its proper divisors (1).

38509481 is an equidigital number, since it uses as much as digits as its factorization.

38509481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 38509481 is about 6205.6007767178. The cubic root of 38509481 is about 337.6933863799.

It can be divided in two parts, 3850 and 9481, that added together give a palindrome (13331).

The spelling of 38509481 in words is "thirty-eight million, five hundred nine thousand, four hundred eighty-one".