406213523 has 2 divisors, whose sum is σ = 406213524. Its totient is φ = 406213522.

The previous prime is 406213501. The next prime is 406213541. The reversal of 406213523 is 325312604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406213523 - 2¹⁸ = 405951379 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 406213492 and 406213501.

It is not a weakly prime, because it can be changed into another prime (406213543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203106761 + 203106762.

It is an arithmetic number, because the mean of its divisors is an integer number (203106762).

Almost surely, 2^406213523 is an apocalyptic number.

406213523 is a deficient number, since it is larger than the sum of its proper divisors (1).

406213523 is an equidigital number, since it uses as much as digits as its factorization.

406213523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 406213523 is about 20154.7394674305. The cubic root of 406213523 is about 740.6018496755.

It can be divided in two parts, 40621 and 3523, that added together give a palindrome (44144).

The spelling of 406213523 in words is "four hundred six million, two hundred thirteen thousand, five hundred twenty-three".