400213403 has 2 divisors, whose sum is σ = 400213404. Its totient is φ = 400213402.

The previous prime is 400213399. The next prime is 400213481. The reversal of 400213403 is 304312004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400213403 - 2² = 400213399 is a prime.

It is not a weakly prime, because it can be changed into another prime (400213483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200106701 + 200106702.

It is an arithmetic number, because the mean of its divisors is an integer number (200106702).

Almost surely, 2^400213403 is an apocalyptic number.

400213403 is a deficient number, since it is larger than the sum of its proper divisors (1).

400213403 is an equidigital number, since it uses as much as digits as its factorization.

400213403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400213403 is about 20005.3343636141. The cubic root of 400213403 is about 736.9373069954.

Adding to 400213403 its reverse (304312004), we get a palindrome (704525407).

The spelling of 400213403 in words is "four hundred million, two hundred thirteen thousand, four hundred three".