446991973 has 4 divisors (see below), whose sum is σ = 447117408. Its totient is φ = 446866540.

The previous prime is 446991971. The next prime is 446992019. The reversal of 446991973 is 379199644.

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 446991973 - 2¹ = 446991971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 446991973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (446991971) 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, 57211 + ... + 64552.

It is an arithmetic number, because the mean of its divisors is an integer number (111779352).

Almost surely, 2^446991973 is an apocalyptic number.

It is an amenable number.

446991973 is a deficient number, since it is larger than the sum of its proper divisors (125435).

446991973 is a wasteful number, since it uses less digits than its factorization.

446991973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125434.

The product of its digits is 1469664, while the sum is 52.

The square root of 446991973 is about 21142.1846789777. The cubic root of 446991973 is about 764.5981474109.

The spelling of 446991973 in words is "four hundred forty-six million, nine hundred ninety-one thousand, nine hundred seventy-three".