654404437 has 4 divisors (see below), whose sum is σ = 656495500. Its totient is φ = 652313376.

The previous prime is 654404431. The next prime is 654404501. The reversal of 654404437 is 734404456.

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 70408881 + 583995556 = 8391^2 + 24166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654404437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 654404396 and 654404405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654404431) 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, 1045062 + ... + 1045687.

It is an arithmetic number, because the mean of its divisors is an integer number (164123875).

Almost surely, 2^654404437 is an apocalyptic number.

It is an amenable number.

654404437 is a deficient number, since it is larger than the sum of its proper divisors (2091063).

654404437 is a wasteful number, since it uses less digits than its factorization.

654404437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091062.

The product of its (nonzero) digits is 161280, while the sum is 37.

The square root of 654404437 is about 25581.3298520620. The cubic root of 654404437 is about 868.1912644731.

The spelling of 654404437 in words is "six hundred fifty-four million, four hundred four thousand, four hundred thirty-seven".