654391442 has 4 divisors (see below), whose sum is σ = 981587166. Its totient is φ = 327195720.

The previous prime is 654391433. The next prime is 654391453. The reversal of 654391442 is 244193456.

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

It can be written as a sum of positive squares in only one way, i.e., 523997881 + 130393561 = 22891^2 + 11419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 654391396 and 654391405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163597859 + ... + 163597862.

Almost surely, 2^654391442 is an apocalyptic number.

654391442 is a deficient number, since it is larger than the sum of its proper divisors (327195724).

654391442 is a wasteful number, since it uses less digits than its factorization.

654391442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327195723.

The product of its digits is 103680, while the sum is 38.

The square root of 654391442 is about 25581.0758569690. The cubic root of 654391442 is about 868.1855176599.

The spelling of 654391442 in words is "six hundred fifty-four million, three hundred ninety-one thousand, four hundred forty-two".