685088254 has 4 divisors (see below), whose sum is σ = 1027632384. Its totient is φ = 342544126.

The previous prime is 685088249. The next prime is 685088267. The reversal of 685088254 is 452880586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 452880586 = 2 ⋅226440293.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171272062 + ... + 171272065.

It is an arithmetic number, because the mean of its divisors is an integer number (256908096).

Almost surely, 2^685088254 is an apocalyptic number.

685088254 is a deficient number, since it is larger than the sum of its proper divisors (342544130).

685088254 is a wasteful number, since it uses less digits than its factorization.

685088254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342544129.

The product of its (nonzero) digits is 614400, while the sum is 46.

The square root of 685088254 is about 26174.1906083073. The cubic root of 685088254 is about 881.5538378961.

The spelling of 685088254 in words is "six hundred eighty-five million, eighty-eight thousand, two hundred fifty-four".