685453487 has 2 divisors, whose sum is σ = 685453488. Its totient is φ = 685453486.

The previous prime is 685453463. The next prime is 685453501. The reversal of 685453487 is 784354586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685453487 - 2¹⁶ = 685387951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685459487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342726743 + 342726744.

It is an arithmetic number, because the mean of its divisors is an integer number (342726744).

Almost surely, 2^685453487 is an apocalyptic number.

685453487 is a deficient number, since it is larger than the sum of its proper divisors (1).

685453487 is an equidigital number, since it uses as much as digits as its factorization.

685453487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 50.

The square root of 685453487 is about 26181.1666470385. The cubic root of 685453487 is about 881.7104675232.

The spelling of 685453487 in words is "six hundred eighty-five million, four hundred fifty-three thousand, four hundred eighty-seven".