685916954 has 8 divisors (see below), whose sum is σ = 1029049920. Its totient is φ = 342900316.

The previous prime is 685916953. The next prime is 685916977. The reversal of 685916954 is 459619586.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 685916896 and 685916905.

It is not an unprimeable number, because it can be changed into a prime (685916953) 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, 12434 + ... + 39069.

It is an arithmetic number, because the mean of its divisors is an integer number (128631240).

Almost surely, 2^685916954 is an apocalyptic number.

685916954 is a deficient number, since it is larger than the sum of its proper divisors (343132966).

685916954 is a wasteful number, since it uses less digits than its factorization.

685916954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58164.

The product of its digits is 2332800, while the sum is 53.

The square root of 685916954 is about 26190.0163039277. The cubic root of 685916954 is about 881.9091445774.

The spelling of 685916954 in words is "six hundred eighty-five million, nine hundred sixteen thousand, nine hundred fifty-four".