654440169 has 4 divisors (see below), whose sum is σ = 872586896. Its totient is φ = 436293444.

The previous prime is 654440167. The next prime is 654440197. The reversal of 654440169 is 961044456.

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 not a de Polignac number, because 654440169 - 2¹ = 654440167 is a prime.

It is a super-2 number, since 2×654440169² = 856583869601497122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654440167) 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, 109073359 + ... + 109073364.

It is an arithmetic number, because the mean of its divisors is an integer number (218146724).

Almost surely, 2^654440169 is an apocalyptic number.

It is an amenable number.

654440169 is a deficient number, since it is larger than the sum of its proper divisors (218146727).

654440169 is a wasteful number, since it uses less digits than its factorization.

654440169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218146726.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 654440169 is about 25582.0282424987. The cubic root of 654440169 is about 868.2070659377.

The spelling of 654440169 in words is "six hundred fifty-four million, four hundred forty thousand, one hundred sixty-nine".