38690081 has 2 divisors, whose sum is σ = 38690082. Its totient is φ = 38690080.

The previous prime is 38690039. The next prime is 38690083. The reversal of 38690081 is 18009683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38688400 + 1681 = 6220^2 + 41^2 .

It is an emirp because it is prime and its reverse (18009683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38690081 - 2¹⁴ = 38673697 is a prime.

It is a super-2 number, since 2×38690081² = 2993844735573122, which contains 22 as substring.

Together with 38690083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38690083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19345040 + 19345041.

It is an arithmetic number, because the mean of its divisors is an integer number (19345041).

Almost surely, 2^38690081 is an apocalyptic number.

It is an amenable number.

38690081 is a deficient number, since it is larger than the sum of its proper divisors (1).

38690081 is an equidigital number, since it uses as much as digits as its factorization.

38690081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 38690081 is about 6220.1351271496. The cubic root of 38690081 is about 338.2204629417.

The spelling of 38690081 in words is "thirty-eight million, six hundred ninety thousand, eighty-one".