654689139 has 8 divisors (see below), whose sum is σ = 940066512. Its totient is φ = 402885600.

The previous prime is 654689131. The next prime is 654689141. The reversal of 654689139 is 931986456.

654689139 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 not a de Polignac number, because 654689139 - 2³ = 654689131 is a prime.

It is a super-2 number, since 2×654689139² = 857235737449122642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 654689091 and 654689100.

It is not an unprimeable number, because it can be changed into a prime (654689131) 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, 8393412 + ... + 8393489.

It is an arithmetic number, because the mean of its divisors is an integer number (117508314).

Almost surely, 2^654689139 is an apocalyptic number.

654689139 is a deficient number, since it is larger than the sum of its proper divisors (285377373).

654689139 is a wasteful number, since it uses less digits than its factorization.

654689139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16786917.

The product of its digits is 1399680, while the sum is 51.

The square root of 654689139 is about 25586.8938912092. The cubic root of 654689139 is about 868.3171499037.

The spelling of 654689139 in words is "six hundred fifty-four million, six hundred eighty-nine thousand, one hundred thirty-nine".