447347661 has 4 divisors (see below), whose sum is σ = 596463552. Its totient is φ = 298231772.

The previous prime is 447347627. The next prime is 447347683. The reversal of 447347661 is 166743744.

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 a cyclic number.

It is not a de Polignac number, because 447347661 - 2¹⁴ = 447331277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447347611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74557941 + ... + 74557946.

It is an arithmetic number, because the mean of its divisors is an integer number (149115888).

Almost surely, 2^447347661 is an apocalyptic number.

It is an amenable number.

447347661 is a deficient number, since it is larger than the sum of its proper divisors (149115891).

447347661 is a wasteful number, since it uses less digits than its factorization.

447347661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149115890.

The product of its digits is 338688, while the sum is 42.

The square root of 447347661 is about 21150.5948143309. The cubic root of 447347661 is about 764.8008999571.

The spelling of 447347661 in words is "four hundred forty-seven million, three hundred forty-seven thousand, six hundred sixty-one".