686896149 has 8 divisors (see below), whose sum is σ = 918170080. Its totient is φ = 456776496.

The previous prime is 686896139. The next prime is 686896159. The reversal of 686896149 is 941698686.

It is an interprime number because it is at equal distance from previous prime (686896139) and next prime (686896159).

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

It is not a de Polignac number, because 686896149 - 2⁸ = 686895893 is a prime.

It is a super-2 number, since 2×686896149² = 943652639022060402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686896139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287179 + ... + 289560.

It is an arithmetic number, because the mean of its divisors is an integer number (114771260).

Almost surely, 2^686896149 is an apocalyptic number.

It is an amenable number.

686896149 is a deficient number, since it is larger than the sum of its proper divisors (231273931).

686896149 is a wasteful number, since it uses less digits than its factorization.

686896149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577139.

The product of its digits is 4478976, while the sum is 57.

The square root of 686896149 is about 26208.7036878973. The cubic root of 686896149 is about 882.3286076110.

The spelling of 686896149 in words is "six hundred eighty-six million, eight hundred ninety-six thousand, one hundred forty-nine".