685412415437 has 2 divisors, whose sum is σ = 685412415438. Its totient is φ = 685412415436.

The previous prime is 685412415367. The next prime is 685412415473. The reversal of 685412415437 is 734514214586.

It is a happy number.

Together with next prime (685412415473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674863893001 + 10548522436 = 821501^2 + 102706^2 .

It is a cyclic number.

It is not a de Polignac number, because 685412415437 - 2³⁴ = 668232546253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685412412437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342706207718 + 342706207719.

It is an arithmetic number, because the mean of its divisors is an integer number (342706207719).

Almost surely, 2^685412415437 is an apocalyptic number.

It is an amenable number.

685412415437 is a deficient number, since it is larger than the sum of its proper divisors (1).

685412415437 is an equidigital number, since it uses as much as digits as its factorization.

685412415437 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 685412415437 in words is "six hundred eighty-five billion, four hundred twelve million, four hundred fifteen thousand, four hundred thirty-seven".