685777153 has 4 divisors (see below), whose sum is σ = 688307968. Its totient is φ = 683246340.

The previous prime is 685777121. The next prime is 685777159. The reversal of 685777153 is 351777586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685777153 - 2⁵ = 685777121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685777097 and 685777106.

It is not an unprimeable number, because it can be changed into a prime (685777159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265001 + ... + 1265542.

It is an arithmetic number, because the mean of its divisors is an integer number (172076992).

Almost surely, 2^685777153 is an apocalyptic number.

It is an amenable number.

685777153 is a deficient number, since it is larger than the sum of its proper divisors (2530815).

685777153 is a wasteful number, since it uses less digits than its factorization.

685777153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530814.

The product of its digits is 1234800, while the sum is 49.

The square root of 685777153 is about 26187.3471928716. The cubic root of 685777153 is about 881.8492247106.

The spelling of 685777153 in words is "six hundred eighty-five million, seven hundred seventy-seven thousand, one hundred fifty-three".