1687137344 has 14 divisors (see below), whose sum is σ = 3347913294. Its totient is φ = 843568640.

The previous prime is 1687137343. The next prime is 1687137349. The reversal of 1687137344 is 4437317861.

It can be written as a sum of positive squares in only one way, i.e., 1218847744 + 468289600 = 34912^2 + 21640^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1687137295 and 1687137304.

It is not an unprimeable number, because it can be changed into a prime (1687137343) 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, 13180697 + ... + 13180824.

Almost surely, 2^1687137344 is an apocalyptic number.

It is an amenable number.

1687137344 is a deficient number, since it is larger than the sum of its proper divisors (1660775950).

1687137344 is an equidigital number, since it uses as much as digits as its factorization.

1687137344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26361533 (or 26361523 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 1687137344 is about 41074.7774674434. Note that the first 3 decimals coincide. The cubic root of 1687137344 is about 1190.4654968635.

The spelling of 1687137344 in words is "one billion, six hundred eighty-seven million, one hundred thirty-seven thousand, three hundred forty-four".