654546421 has 4 divisors (see below), whose sum is σ = 658939500. Its totient is φ = 650153344.

The previous prime is 654546419. The next prime is 654546433. The reversal of 654546421 is 124645456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54982225 + 599564196 = 7415^2 + 24486^2 .

It is a cyclic number.

It is not a de Polignac number, because 654546421 - 2¹ = 654546419 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 (654546481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2196316 + ... + 2196613.

It is an arithmetic number, because the mean of its divisors is an integer number (164734875).

Almost surely, 2^654546421 is an apocalyptic number.

It is an amenable number.

654546421 is a deficient number, since it is larger than the sum of its proper divisors (4393079).

654546421 is a wasteful number, since it uses less digits than its factorization.

654546421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393078.

The product of its digits is 115200, while the sum is 37.

The square root of 654546421 is about 25584.1048504731. The cubic root of 654546421 is about 868.2540494766.

The spelling of 654546421 in words is "six hundred fifty-four million, five hundred forty-six thousand, four hundred twenty-one".