687492149 has 8 divisors (see below), whose sum is σ = 717740352. Its totient is φ = 657273760.

The previous prime is 687492137. The next prime is 687492163. The reversal of 687492149 is 941294786.

687492149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-687492149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 687492097 and 687492106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687092149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48794 + ... + 61284.

It is an arithmetic number, because the mean of its divisors is an integer number (89717544).

Almost surely, 2^687492149 is an apocalyptic number.

It is an amenable number.

687492149 is a deficient number, since it is larger than the sum of its proper divisors (30248203).

687492149 is a wasteful number, since it uses less digits than its factorization.

687492149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14907.

The product of its digits is 870912, while the sum is 50.

The square root of 687492149 is about 26220.0714911306. The cubic root of 687492149 is about 882.5837242109.

The spelling of 687492149 in words is "six hundred eighty-seven million, four hundred ninety-two thousand, one hundred forty-nine".