1001063399 has 4 divisors (see below), whose sum is σ = 1144072464. Its totient is φ = 858054336.

The previous prime is 1001063389. The next prime is 1001063429. The reversal of 1001063399 is 9933601001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001063399 - 2⁸ = 1001063143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001063389) 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, 71504522 + ... + 71504535.

It is an arithmetic number, because the mean of its divisors is an integer number (286018116).

Almost surely, 2^1001063399 is an apocalyptic number.

1001063399 is a deficient number, since it is larger than the sum of its proper divisors (143009065).

1001063399 is an equidigital number, since it uses as much as digits as its factorization.

1001063399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143009064.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 1001063399 is about 31639.5859486182. The cubic root of 1001063399 is about 1000.3543407611.

The spelling of 1001063399 in words is "one billion, one million, sixty-three thousand, three hundred ninety-nine".