406251613 has 2 divisors, whose sum is σ = 406251614. Its totient is φ = 406251612.

The previous prime is 406251589. The next prime is 406251631. The reversal of 406251613 is 316152604.

Together with next prime (406251631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224460324 + 181791289 = 14982^2 + 13483^2 .

It is a cyclic number.

It is not a de Polignac number, because 406251613 - 2⁵ = 406251581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406251653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203125806 + 203125807.

It is an arithmetic number, because the mean of its divisors is an integer number (203125807).

Almost surely, 2^406251613 is an apocalyptic number.

It is an amenable number.

406251613 is a deficient number, since it is larger than the sum of its proper divisors (1).

406251613 is an equidigital number, since it uses as much as digits as its factorization.

406251613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 406251613 is about 20155.6843843120. The cubic root of 406251613 is about 740.6249973069.

Subtracting from 406251613 its reverse (316152604), we obtain a palindrome (90099009).

The spelling of 406251613 in words is "four hundred six million, two hundred fifty-one thousand, six hundred thirteen".