447993645 has 16 divisors (see below), whose sum is σ = 781952832. Its totient is φ = 217208960.

The previous prime is 447993641. The next prime is 447993649. The reversal of 447993645 is 546399744.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (447993641) and next prime (447993649).

It is not a de Polignac number, because 447993645 - 2² = 447993641 is a prime.

It is a super-3 number, since 3×447993645³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447993641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1357392 + ... + 1357721.

It is an arithmetic number, because the mean of its divisors is an integer number (48872052).

Almost surely, 2^447993645 is an apocalyptic number.

It is an amenable number.

447993645 is a deficient number, since it is larger than the sum of its proper divisors (333959187).

447993645 is a wasteful number, since it uses less digits than its factorization.

447993645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715132.

The product of its digits is 3265920, while the sum is 51.

The square root of 447993645 is about 21165.8603652202. The cubic root of 447993645 is about 765.1688550330.

The spelling of 447993645 in words is "four hundred forty-seven million, nine hundred ninety-three thousand, six hundred forty-five".