685653037 has 2 divisors, whose sum is σ = 685653038. Its totient is φ = 685653036.

The previous prime is 685652987. The next prime is 685653041. The reversal of 685653037 is 730356586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606193641 + 79459396 = 24621^2 + 8914^2 .

It is a cyclic number.

It is not a de Polignac number, because 685653037 - 2¹¹ = 685650989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685652984 and 685653002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685653047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342826518 + 342826519.

It is an arithmetic number, because the mean of its divisors is an integer number (342826519).

Almost surely, 2^685653037 is an apocalyptic number.

It is an amenable number.

685653037 is a deficient number, since it is larger than the sum of its proper divisors (1).

685653037 is an equidigital number, since it uses as much as digits as its factorization.

685653037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 685653037 is about 26184.9773152470. The cubic root of 685653037 is about 881.7960207402.

The spelling of 685653037 in words is "six hundred eighty-five million, six hundred fifty-three thousand, thirty-seven".