945221003999 has 8 divisors (see below), whose sum is σ = 976311756288. Its totient is φ = 914167736280.

The previous prime is 945221003971. The next prime is 945221004029. The reversal of 945221003999 is 999300122549.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 945221003999 - 2¹⁶ = 945220938463 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 945221003999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945221003299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9319877 + ... + 9420750.

It is an arithmetic number, because the mean of its divisors is an integer number (122038969536).

Almost surely, 2^945221003999 is an apocalyptic number.

945221003999 is a deficient number, since it is larger than the sum of its proper divisors (31090752289).

945221003999 is a wasteful number, since it uses less digits than its factorization.

945221003999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18742285.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 945221003999 in words is "nine hundred forty-five billion, two hundred twenty-one million, three thousand, nine hundred ninety-nine".