447391090129 has 3 divisors (see below), whose sum is σ = 447391759003. Its totient is φ = 447390421256.

The previous prime is 447391090067. The next prime is 447391090141. The reversal of 447391090129 is 921090193744.

The square root of 447391090129 is 668873.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4963907025 + 442427183104 = 70455^2 + 665152^2 .

It is not a de Polignac number, because 447391090129 - 2²⁷ = 447256872401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (447391090829) 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 2 ways as a sum of consecutive naturals, for example, 334437 + ... + 1003309.

Almost surely, 2^447391090129 is an apocalyptic number.

447391090129 is the 668873-rd square number.

447391090129 is the 334437-th centered octagonal number.

It is an amenable number.

447391090129 is a deficient number, since it is larger than the sum of its proper divisors (668874).

447391090129 is an frugal number, since it uses more digits than its factorization.

447391090129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337746 (or 668873 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

Multiplying 447391090129 by its sum of digits (49), we get a square (21922163416321 = 4682111²).

The spelling of 447391090129 in words is "four hundred forty-seven billion, three hundred ninety-one million, ninety thousand, one hundred twenty-nine".