447772749 has 4 divisors (see below), whose sum is σ = 597030336. Its totient is φ = 298515164.

The previous prime is 447772739. The next prime is 447772781. The reversal of 447772749 is 947277744.

It is a happy number.

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 447772749 - 2⁴ = 447772733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447772739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74628789 + ... + 74628794.

It is an arithmetic number, because the mean of its divisors is an integer number (149257584).

Almost surely, 2^447772749 is an apocalyptic number.

It is an amenable number.

447772749 is a deficient number, since it is larger than the sum of its proper divisors (149257587).

447772749 is a wasteful number, since it uses less digits than its factorization.

447772749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149257586.

The product of its digits is 2765952, while the sum is 51.

The square root of 447772749 is about 21160.6415072890. The cubic root of 447772749 is about 765.0430716063.

The spelling of 447772749 in words is "four hundred forty-seven million, seven hundred seventy-two thousand, seven hundred forty-nine".