400140353 has 2 divisors, whose sum is σ = 400140354. Its totient is φ = 400140352.

The previous prime is 400140341. The next prime is 400140383. The reversal of 400140353 is 353041004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398681089 + 1459264 = 19967^2 + 1208^2 .

It is a cyclic number.

It is not a de Polignac number, because 400140353 - 2⁴ = 400140337 is a prime.

It is a super-2 number, since 2×400140353² = 320224604197929218, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (400140313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200070176 + 200070177.

It is an arithmetic number, because the mean of its divisors is an integer number (200070177).

Almost surely, 2^400140353 is an apocalyptic number.

It is an amenable number.

400140353 is a deficient number, since it is larger than the sum of its proper divisors (1).

400140353 is an equidigital number, since it uses as much as digits as its factorization.

400140353 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 20.

The square root of 400140353 is about 20003.5085172577. The cubic root of 400140353 is about 736.8924671295.

Adding to 400140353 its reverse (353041004), we get a palindrome (753181357).

The spelling of 400140353 in words is "four hundred million, one hundred forty thousand, three hundred fifty-three".