406776613 has 2 divisors, whose sum is σ = 406776614. Its totient is φ = 406776612.

The previous prime is 406776611. The next prime is 406776641. The reversal of 406776613 is 316677604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406344964 + 431649 = 20158^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 406776613 - 2¹ = 406776611 is a prime.

Together with 406776611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406776611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203388306 + 203388307.

It is an arithmetic number, because the mean of its divisors is an integer number (203388307).

Almost surely, 2^406776613 is an apocalyptic number.

It is an amenable number.

406776613 is a deficient number, since it is larger than the sum of its proper divisors (1).

406776613 is an equidigital number, since it uses as much as digits as its factorization.

406776613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 406776613 is about 20168.7038006908. The cubic root of 406776613 is about 740.9438971683.

Subtracting from 406776613 its reverse (316677604), we obtain a palindrome (90099009).

The spelling of 406776613 in words is "four hundred six million, seven hundred seventy-six thousand, six hundred thirteen".