38821537 has 2 divisors, whose sum is σ = 38821538. Its totient is φ = 38821536.

The previous prime is 38821529. The next prime is 38821543. The reversal of 38821537 is 73512883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37466641 + 1354896 = 6121^2 + 1164^2 .

It is a cyclic number.

It is not a de Polignac number, because 38821537 - 2³ = 38821529 is a prime.

It is a super-2 number, since 2×38821537² = 3014223470084738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38821496 and 38821505.

It is not a weakly prime, because it can be changed into another prime (38821337) 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, 19410768 + 19410769.

It is an arithmetic number, because the mean of its divisors is an integer number (19410769).

Almost surely, 2^38821537 is an apocalyptic number.

It is an amenable number.

38821537 is a deficient number, since it is larger than the sum of its proper divisors (1).

38821537 is an equidigital number, since it uses as much as digits as its factorization.

38821537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 38821537 is about 6230.6931396114. The cubic root of 38821537 is about 338.6030833979.

The spelling of 38821537 in words is "thirty-eight million, eight hundred twenty-one thousand, five hundred thirty-seven".