406613257 has 2 divisors, whose sum is σ = 406613258. Its totient is φ = 406613256.

The previous prime is 406613219. The next prime is 406613279. The reversal of 406613257 is 752316604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204518601 + 202094656 = 14301^2 + 14216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406613257 is a prime.

It is not a weakly prime, because it can be changed into another prime (406613057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203306628 + 203306629.

It is an arithmetic number, because the mean of its divisors is an integer number (203306629).

Almost surely, 2^406613257 is an apocalyptic number.

It is an amenable number.

406613257 is a deficient number, since it is larger than the sum of its proper divisors (1).

406613257 is an equidigital number, since it uses as much as digits as its factorization.

406613257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 406613257 is about 20164.6536543527. The cubic root of 406613257 is about 740.8446995306.

The spelling of 406613257 in words is "four hundred six million, six hundred thirteen thousand, two hundred fifty-seven".