654691055 has 4 divisors (see below), whose sum is σ = 785629272. Its totient is φ = 523752840.

The previous prime is 654691049. The next prime is 654691057. The reversal of 654691055 is 550196456.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 654691055 - 2⁶ = 654690991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654691057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65469101 + ... + 65469110.

It is an arithmetic number, because the mean of its divisors is an integer number (196407318).

Almost surely, 2^654691055 is an apocalyptic number.

654691055 is a deficient number, since it is larger than the sum of its proper divisors (130938217).

654691055 is a wasteful number, since it uses less digits than its factorization.

654691055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130938216.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 654691055 is about 25586.9313322251. The cubic root of 654691055 is about 868.3179969694.

The spelling of 654691055 in words is "six hundred fifty-four million, six hundred ninety-one thousand, fifty-five".