654707642 has 4 divisors (see below), whose sum is σ = 982061466. Its totient is φ = 327353820.

The previous prime is 654707609. The next prime is 654707657. The reversal of 654707642 is 246707456.

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., 589081441 + 65626201 = 24271^2 + 8101^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 654707642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163676909 + ... + 163676912.

Almost surely, 2^654707642 is an apocalyptic number.

654707642 is a deficient number, since it is larger than the sum of its proper divisors (327353824).

654707642 is a wasteful number, since it uses less digits than its factorization.

654707642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327353823.

The product of its (nonzero) digits is 282240, while the sum is 41.

The square root of 654707642 is about 25587.2554604827. The cubic root of 654707642 is about 868.3253300307.

The spelling of 654707642 in words is "six hundred fifty-four million, seven hundred seven thousand, six hundred forty-two".