685414157 has 2 divisors, whose sum is σ = 685414158. Its totient is φ = 685414156.

The previous prime is 685414153. The next prime is 685414183. The reversal of 685414157 is 751414586.

685414157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356680996 + 328733161 = 18886^2 + 18131^2 .

It is a cyclic number.

It is not a de Polignac number, because 685414157 - 2² = 685414153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685414153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342707078 + 342707079.

It is an arithmetic number, because the mean of its divisors is an integer number (342707079).

Almost surely, 2^685414157 is an apocalyptic number.

It is an amenable number.

685414157 is a deficient number, since it is larger than the sum of its proper divisors (1).

685414157 is an equidigital number, since it uses as much as digits as its factorization.

685414157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 41.

The square root of 685414157 is about 26180.4155238224. The cubic root of 685414157 is about 881.6936035849.

The spelling of 685414157 in words is "six hundred eighty-five million, four hundred fourteen thousand, one hundred fifty-seven".