442947953 has 4 divisors (see below), whose sum is σ = 506226240. Its totient is φ = 379669668.

The previous prime is 442947949. The next prime is 442947959. The reversal of 442947953 is 359749244.

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 not a de Polignac number, because 442947953 - 2² = 442947949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442947898 and 442947907.

It is not an unprimeable number, because it can be changed into a prime (442947959) 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, 31639133 + ... + 31639146.

It is an arithmetic number, because the mean of its divisors is an integer number (126556560).

Almost surely, 2^442947953 is an apocalyptic number.

It is an amenable number.

442947953 is a deficient number, since it is larger than the sum of its proper divisors (63278287).

442947953 is an equidigital number, since it uses as much as digits as its factorization.

442947953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63278286.

The product of its digits is 1088640, while the sum is 47.

The square root of 442947953 is about 21046.3287297334. The cubic root of 442947953 is about 762.2853376918.

The spelling of 442947953 in words is "four hundred forty-two million, nine hundred forty-seven thousand, nine hundred fifty-three".