654143957 has 4 divisors (see below), whose sum is σ = 654198636. Its totient is φ = 654089280.

The previous prime is 654143879. The next prime is 654143983. The reversal of 654143957 is 759341456.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 338228881 + 315915076 = 18391^2 + 17774^2 .

It is a cyclic number.

It is not a de Polignac number, because 654143957 - 2¹⁰ = 654142933 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 (654143257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818 + ... + 36179.

It is an arithmetic number, because the mean of its divisors is an integer number (163549659).

Almost surely, 2^654143957 is an apocalyptic number.

It is an amenable number.

654143957 is a deficient number, since it is larger than the sum of its proper divisors (54679).

654143957 is a wasteful number, since it uses less digits than its factorization.

654143957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54678.

The product of its digits is 453600, while the sum is 44.

The square root of 654143957 is about 25576.2381322977. The cubic root of 654143957 is about 868.0760571897.

The spelling of 654143957 in words is "six hundred fifty-four million, one hundred forty-three thousand, nine hundred fifty-seven".