654402943 has 4 divisors (see below), whose sum is σ = 657691600. Its totient is φ = 651114288.

The previous prime is 654402929. The next prime is 654402961. The reversal of 654402943 is 349204456.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 654402943 - 2²¹ = 652305791 is a prime.

It is a super-2 number, since 2×654402943² = 856486423614122498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654402143) 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, 1644030 + ... + 1644427.

It is an arithmetic number, because the mean of its divisors is an integer number (164422900).

Almost surely, 2^654402943 is an apocalyptic number.

654402943 is a deficient number, since it is larger than the sum of its proper divisors (3288657).

654402943 is a wasteful number, since it uses less digits than its factorization.

654402943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288656.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 654402943 is about 25581.3006510615. The cubic root of 654402943 is about 868.1906037814.

The spelling of 654402943 in words is "six hundred fifty-four million, four hundred two thousand, nine hundred forty-three".