685154997 has 16 divisors (see below), whose sum is σ = 1017934080. Its totient is φ = 455469696.

The previous prime is 685154993. The next prime is 685155007. The reversal of 685154997 is 799451586.

685154997 is a `hidden beast` number, since 6 + 8 + 5 + 1 + 549 + 97 = 666.

685154997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685154997 - 2² = 685154993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685154993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26413 + ... + 45474.

It is an arithmetic number, because the mean of its divisors is an integer number (63620880).

Almost surely, 2^685154997 is an apocalyptic number.

It is an amenable number.

685154997 is a deficient number, since it is larger than the sum of its proper divisors (332779083).

685154997 is a wasteful number, since it uses less digits than its factorization.

685154997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72249 (or 72243 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 685154997 is about 26175.4655545990. The cubic root of 685154997 is about 881.5824646883.

The spelling of 685154997 in words is "six hundred eighty-five million, one hundred fifty-four thousand, nine hundred ninety-seven".