1000406431 has 2 divisors, whose sum is σ = 1000406432. Its totient is φ = 1000406430.

The previous prime is 1000406399. The next prime is 1000406441. The reversal of 1000406431 is 1346040001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000406431 - 2⁵ = 1000406399 is a prime.

It is a super-2 number, since 2×1000406431² = 2001626054372315522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1000406399 and 1000406408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000406441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500203215 + 500203216.

It is an arithmetic number, because the mean of its divisors is an integer number (500203216).

Almost surely, 2^1000406431 is an apocalyptic number.

1000406431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000406431 is an equidigital number, since it uses as much as digits as its factorization.

1000406431 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 19.

The square root of 1000406431 is about 31629.2021872193. The cubic root of 1000406431 is about 1000.1354586501.

Adding to 1000406431 its reverse (1346040001), we get a palindrome (2346446432).

The spelling of 1000406431 in words is "one billion, four hundred six thousand, four hundred thirty-one".