400143329 has 2 divisors, whose sum is σ = 400143330. Its totient is φ = 400143328.

The previous prime is 400143311. The next prime is 400143349. The reversal of 400143329 is 923341004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226562704 + 173580625 = 15052^2 + 13175^2 .

It is a cyclic number.

It is not a de Polignac number, because 400143329 - 2¹⁶ = 400077793 is a prime.

It is a super-2 number, since 2×400143329² = 320229367486404482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400143298 and 400143307.

It is not a weakly prime, because it can be changed into another prime (400143349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200071664 + 200071665.

It is an arithmetic number, because the mean of its divisors is an integer number (200071665).

Almost surely, 2^400143329 is an apocalyptic number.

It is an amenable number.

400143329 is a deficient number, since it is larger than the sum of its proper divisors (1).

400143329 is an equidigital number, since it uses as much as digits as its factorization.

400143329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 400143329 is about 20003.5829040700. The cubic root of 400143329 is about 736.8942939773.

The spelling of 400143329 in words is "four hundred million, one hundred forty-three thousand, three hundred twenty-nine".