1688941503 has 8 divisors (see below), whose sum is σ = 2502135600. Its totient is φ = 1125960984.

The previous prime is 1688941489. The next prime is 1688941523. The reversal of 1688941503 is 3051498861.

1688941503 is a `hidden beast` number, since 1 + 68 + 89 + 4 + 1 + 503 = 666.

It is not a de Polignac number, because 1688941503 - 2⁶ = 1688941439 is a prime.

It is a super-3 number, since 3×1688941503³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688941523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31276668 + ... + 31276721.

It is an arithmetic number, because the mean of its divisors is an integer number (312766950).

Almost surely, 2^1688941503 is an apocalyptic number.

1688941503 is a deficient number, since it is larger than the sum of its proper divisors (813194097).

1688941503 is an equidigital number, since it uses as much as digits as its factorization.

1688941503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62553398 (or 62553392 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1688941503 is about 41096.7334833317. The cubic root of 1688941503 is about 1190.8896915140.

The spelling of 1688941503 in words is "one billion, six hundred eighty-eight million, nine hundred forty-one thousand, five hundred three".