400532317 has 2 divisors, whose sum is σ = 400532318. Its totient is φ = 400532316.

The previous prime is 400532273. The next prime is 400532333. The reversal of 400532317 is 713235004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399560121 + 972196 = 19989^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 400532317 - 2¹¹ = 400530269 is a prime.

It is a super-2 number, since 2×400532317² = 320852273922776978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400532291 and 400532300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400532117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200266158 + 200266159.

It is an arithmetic number, because the mean of its divisors is an integer number (200266159).

Almost surely, 2^400532317 is an apocalyptic number.

It is an amenable number.

400532317 is a deficient number, since it is larger than the sum of its proper divisors (1).

400532317 is an equidigital number, since it uses as much as digits as its factorization.

400532317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 400532317 is about 20013.3035004219. The cubic root of 400532317 is about 737.1330002799.

The spelling of 400532317 in words is "four hundred million, five hundred thirty-two thousand, three hundred seventeen".