654691401 has 36 divisors (see below), whose sum is σ = 1184690052. Its totient is φ = 345328704.

The previous prime is 654691399. The next prime is 654691409. The reversal of 654691401 is 104196456.

It can be written as a sum of positive squares in 2 ways, for example, as 282240000 + 372451401 = 16800^2 + 19299^2 .

It is not a de Polignac number, because 654691401 - 2¹ = 654691399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (654691409) 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 35 ways as a sum of consecutive naturals, for example, 51366 + ... + 62831.

It is an arithmetic number, because the mean of its divisors is an integer number (32908057).

Almost surely, 2^654691401 is an apocalyptic number.

It is an amenable number.

654691401 is a deficient number, since it is larger than the sum of its proper divisors (529998651).

654691401 is a wasteful number, since it uses less digits than its factorization.

654691401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114230 (or 114220 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 654691401 is about 25586.9380934882. The cubic root of 654691401 is about 868.3181499362.

The spelling of 654691401 in words is "six hundred fifty-four million, six hundred ninety-one thousand, four hundred one".