2001223429 has 2 divisors, whose sum is σ = 2001223430. Its totient is φ = 2001223428.

The previous prime is 2001223363. The next prime is 2001223439. The reversal of 2001223429 is 9243221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1544332804 + 456890625 = 39298^2 + 21375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001223429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001223439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000611714 + 1000611715.

It is an arithmetic number, because the mean of its divisors is an integer number (1000611715).

Almost surely, 2^2001223429 is an apocalyptic number.

It is an amenable number.

2001223429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001223429 is an equidigital number, since it uses as much as digits as its factorization.

2001223429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2001223429 is about 44735.0358108720. The cubic root of 2001223429 is about 1260.1779015204.

The spelling of 2001223429 in words is "two billion, one million, two hundred twenty-three thousand, four hundred twenty-nine".