38904869 has 2 divisors, whose sum is σ = 38904870. Its totient is φ = 38904868.

The previous prime is 38904793. The next prime is 38904881. The reversal of 38904869 is 96840983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29571844 + 9333025 = 5438^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 38904869 - 2²⁰ = 37856293 is a prime.

It is a super-3 number, since 3×38904869³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38904889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19452434 + 19452435.

It is an arithmetic number, because the mean of its divisors is an integer number (19452435).

Almost surely, 2^38904869 is an apocalyptic number.

It is an amenable number.

38904869 is a deficient number, since it is larger than the sum of its proper divisors (1).

38904869 is an equidigital number, since it uses as much as digits as its factorization.

38904869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 38904869 is about 6237.3767723299. The cubic root of 38904869 is about 338.8451853264.

The spelling of 38904869 in words is "thirty-eight million, nine hundred four thousand, eight hundred sixty-nine".