687243226 has 8 divisors (see below), whose sum is σ = 1042447860. Its totient is φ = 339760608.

The previous prime is 687243223. The next prime is 687243233. The reversal of 687243226 is 622342786.

It can be written as a sum of positive squares in 2 ways, for example, as 686387601 + 855625 = 26199^2 + 925^2 .

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

It is not an unprimeable number, because it can be changed into a prime (687243223) 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, 1930281 + ... + 1930636.

Almost surely, 2^687243226 is an apocalyptic number.

687243226 is a deficient number, since it is larger than the sum of its proper divisors (355204634).

687243226 is a wasteful number, since it uses less digits than its factorization.

687243226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861008.

The product of its digits is 193536, while the sum is 40.

The square root of 687243226 is about 26215.3242589139. The cubic root of 687243226 is about 882.4771911596.

The spelling of 687243226 in words is "six hundred eighty-seven million, two hundred forty-three thousand, two hundred twenty-six".