400512029 has 2 divisors, whose sum is σ = 400512030. Its totient is φ = 400512028.

The previous prime is 400511981. The next prime is 400512037. The reversal of 400512029 is 920215004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263575225 + 136936804 = 16235^2 + 11702^2 .

It is a cyclic number.

It is not a de Polignac number, because 400512029 - 2¹⁶ = 400446493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400511995 and 400512013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400512059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200256014 + 200256015.

It is an arithmetic number, because the mean of its divisors is an integer number (200256015).

Almost surely, 2^400512029 is an apocalyptic number.

It is an amenable number.

400512029 is a deficient number, since it is larger than the sum of its proper divisors (1).

400512029 is an equidigital number, since it uses as much as digits as its factorization.

400512029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 400512029 is about 20012.7966311558. The cubic root of 400512029 is about 737.1205541707.

The spelling of 400512029 in words is "four hundred million, five hundred twelve thousand, twenty-nine".