447021938939 has 4 divisors (see below), whose sum is σ = 447023589240. Its totient is φ = 447020288640.

The previous prime is 447021938933. The next prime is 447021938953. The reversal of 447021938939 is 939839120744.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447021938939 is a prime.

It is a super-2 number, since 2×447021938939² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (447021938933) 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, 312797 + ... + 995934.

It is an arithmetic number, because the mean of its divisors is an integer number (111755897310).

Almost surely, 2^447021938939 is an apocalyptic number.

447021938939 is a deficient number, since it is larger than the sum of its proper divisors (1650301).

447021938939 is a wasteful number, since it uses less digits than its factorization.

447021938939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650300.

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 447021938939 in words is "four hundred forty-seven billion, twenty-one million, nine hundred thirty-eight thousand, nine hundred thirty-nine".