1047812661 has 12 divisors (see below), whose sum is σ = 1729722592. Its totient is φ = 598750056.

The previous prime is 1047812641. The next prime is 1047812669. The reversal of 1047812661 is 1662187401.

It is a happy number.

1047812661 is a `hidden beast` number, since 1 + 0 + 478 + 126 + 61 = 666.

It is not a de Polignac number, because 1047812661 - 2⁹ = 1047812149 is a prime.

It is a super-2 number, since 2×1047812661² = 2195822745103801842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047812669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8315911 + ... + 8316036.

Almost surely, 2^1047812661 is an apocalyptic number.

It is an amenable number.

1047812661 is a deficient number, since it is larger than the sum of its proper divisors (681909931).

1047812661 is a wasteful number, since it uses less digits than its factorization.

1047812661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16631960 (or 16631957 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1047812661 is about 32369.9345226400. The cubic root of 1047812661 is about 1015.6900873045.

The spelling of 1047812661 in words is "one billion, forty-seven million, eight hundred twelve thousand, six hundred sixty-one".