683987641 has 2 divisors, whose sum is σ = 683987642. Its totient is φ = 683987640.

The previous prime is 683987621. The next prime is 683987651. The reversal of 683987641 is 146789386.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 482461225 + 201526416 = 21965^2 + 14196^2 .

It is a cyclic number.

It is not a de Polignac number, because 683987641 - 2¹¹ = 683985593 is a prime.

It is not a weakly prime, because it can be changed into another prime (683987621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341993820 + 341993821.

It is an arithmetic number, because the mean of its divisors is an integer number (341993821).

Almost surely, 2^683987641 is an apocalyptic number.

It is an amenable number.

683987641 is a deficient number, since it is larger than the sum of its proper divisors (1).

683987641 is an equidigital number, since it uses as much as digits as its factorization.

683987641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The square root of 683987641 is about 26153.1573810888. The cubic root of 683987641 is about 881.0815047574.

The spelling of 683987641 in words is "six hundred eighty-three million, nine hundred eighty-seven thousand, six hundred forty-one".