38661503 has 2 divisors, whose sum is σ = 38661504. Its totient is φ = 38661502.

The previous prime is 38661473. The next prime is 38661509. The reversal of 38661503 is 30516683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38661503 - 2¹² = 38657407 is a prime.

It is equal to p_2356925 and since 38661503 and 2356925 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38661503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38661509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19330751 + 19330752.

It is an arithmetic number, because the mean of its divisors is an integer number (19330752).

Almost surely, 2^38661503 is an apocalyptic number.

38661503 is a deficient number, since it is larger than the sum of its proper divisors (1).

38661503 is an equidigital number, since it uses as much as digits as its factorization.

38661503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 38661503 is about 6217.8374858145. The cubic root of 38661503 is about 338.1371681632.

The spelling of 38661503 in words is "thirty-eight million, six hundred sixty-one thousand, five hundred three".