418631 has 2 divisors, whose sum is σ = 418632. Its totient is φ = 418630.

The previous prime is 418603. The next prime is 418633. The reversal of 418631 is 136814.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 418631 - 2¹⁸ = 156487 is a prime.

It is a super-2 number, since 2×418631² = 350503828322, which contains 22 as substring.

Together with 418633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 418597 and 418606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (418633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209315 + 209316.

It is an arithmetic number, because the mean of its divisors is an integer number (209316).

2⁴¹⁸⁶³¹ is an apocalyptic number.

418631 is a deficient number, since it is larger than the sum of its proper divisors (1).

418631 is an equidigital number, since it uses as much as digits as its factorization.

418631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 418631 is about 647.0170013222. The cubic root of 418631 is about 74.8072681128.

The spelling of 418631 in words is "four hundred eighteen thousand, six hundred thirty-one".