1688241473 has 2 divisors, whose sum is σ = 1688241474. Its totient is φ = 1688241472.

The previous prime is 1688241427. The next prime is 1688241487. The reversal of 1688241473 is 3741428861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209857089 + 478384384 = 34783^2 + 21872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688241473 - 2²⁶ = 1621132609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1688741473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844120736 + 844120737.

It is an arithmetic number, because the mean of its divisors is an integer number (844120737).

Almost surely, 2^1688241473 is an apocalyptic number.

It is an amenable number.

1688241473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688241473 is an equidigital number, since it uses as much as digits as its factorization.

1688241473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 44.

The square root of 1688241473 is about 41088.2157436898. The cubic root of 1688241473 is about 1190.7251360387.

The spelling of 1688241473 in words is "one billion, six hundred eighty-eight million, two hundred forty-one thousand, four hundred seventy-three".