403420631 has 2 divisors, whose sum is σ = 403420632. Its totient is φ = 403420630.

The previous prime is 403420547. The next prime is 403420637. The reversal of 403420631 is 136024304.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 403420631 - 2¹⁰ = 403419607 is a prime.

It is a super-2 number, since 2×403420631² = 325496411032876322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 403420597 and 403420606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403420637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201710315 + 201710316.

It is an arithmetic number, because the mean of its divisors is an integer number (201710316).

Almost surely, 2^403420631 is an apocalyptic number.

403420631 is a deficient number, since it is larger than the sum of its proper divisors (1).

403420631 is an equidigital number, since it uses as much as digits as its factorization.

403420631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 403420631 is about 20085.3337288679. Note that the first 3 decimals coincide. The cubic root of 403420631 is about 738.9006264838.

Adding to 403420631 its reverse (136024304), we get a palindrome (539444935).

The spelling of 403420631 in words is "four hundred three million, four hundred twenty thousand, six hundred thirty-one".