400545829 has 2 divisors, whose sum is σ = 400545830. Its totient is φ = 400545828.

The previous prime is 400545811. The next prime is 400545839. The reversal of 400545829 is 928545004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388484100 + 12061729 = 19710^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 400545829 - 2⁷ = 400545701 is a prime.

It is a super-2 number, since 2×400545829² = 320873922258594482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400545839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200272914 + 200272915.

It is an arithmetic number, because the mean of its divisors is an integer number (200272915).

Almost surely, 2^400545829 is an apocalyptic number.

It is an amenable number.

400545829 is a deficient number, since it is larger than the sum of its proper divisors (1).

400545829 is an equidigital number, since it uses as much as digits as its factorization.

400545829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 400545829 is about 20013.6410730282. The cubic root of 400545829 is about 737.1412892732.

The spelling of 400545829 in words is "four hundred million, five hundred forty-five thousand, eight hundred twenty-nine".