61871503 has 2 divisors, whose sum is σ = 61871504. Its totient is φ = 61871502.

The previous prime is 61871477. The next prime is 61871549. The reversal of 61871503 is 30517816.

61871503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61871503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61871903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30935751 + 30935752.

It is an arithmetic number, because the mean of its divisors is an integer number (30935752).

Almost surely, 2^61871503 is an apocalyptic number.

61871503 is a deficient number, since it is larger than the sum of its proper divisors (1).

61871503 is an equidigital number, since it uses as much as digits as its factorization.

61871503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 61871503 is about 7865.8440742237. The cubic root of 61871503 is about 395.5155432525.

The spelling of 61871503 in words is "sixty-one million, eight hundred seventy-one thousand, five hundred three".