687942474 has 8 divisors (see below), whose sum is σ = 1375884960. Its totient is φ = 229314156.

The previous prime is 687942461. The next prime is 687942487. The reversal of 687942474 is 474249786.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (687942461) and next prime (687942487).

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

687942474 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57328534 + ... + 57328545.

It is an arithmetic number, because the mean of its divisors is an integer number (171985620).

Almost surely, 2^687942474 is an apocalyptic number.

687942474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687942474 is a wasteful number, since it uses less digits than its factorization.

687942474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114657084.

The product of its digits is 2709504, while the sum is 51.

The square root of 687942474 is about 26228.6574951903. The cubic root of 687942474 is about 882.7763871467.

The spelling of 687942474 in words is "six hundred eighty-seven million, nine hundred forty-two thousand, four hundred seventy-four".