654412621 has 4 divisors (see below), whose sum is σ = 655575552. Its totient is φ = 653249692.

The previous prime is 654412553. The next prime is 654412667. The reversal of 654412621 is 126214456.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 654412621 - 2¹¹ = 654410573 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 (654412691) 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 3 ways as a sum of consecutive naturals, for example, 580621 + ... + 581746.

It is an arithmetic number, because the mean of its divisors is an integer number (163893888).

Almost surely, 2^654412621 is an apocalyptic number.

It is an amenable number.

654412621 is a deficient number, since it is larger than the sum of its proper divisors (1162931).

654412621 is a wasteful number, since it uses less digits than its factorization.

654412621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162930.

The product of its digits is 11520, while the sum is 31.

The square root of 654412621 is about 25581.4898119715. The cubic root of 654412621 is about 868.1948836660.

The spelling of 654412621 in words is "six hundred fifty-four million, four hundred twelve thousand, six hundred twenty-one".