406872469 has 2 divisors, whose sum is σ = 406872470. Its totient is φ = 406872468.

The previous prime is 406872457. The next prime is 406872491. The reversal of 406872469 is 964278604.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321771844 + 85100625 = 17938^2 + 9225^2 .

It is a cyclic number.

It is not a de Polignac number, because 406872469 - 2⁹ = 406871957 is a prime.

It is a super-2 number, since 2×406872469² = 331090412060311922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406872409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203436234 + 203436235.

It is an arithmetic number, because the mean of its divisors is an integer number (203436235).

Almost surely, 2^406872469 is an apocalyptic number.

It is an amenable number.

406872469 is a deficient number, since it is larger than the sum of its proper divisors (1).

406872469 is an equidigital number, since it uses as much as digits as its factorization.

406872469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 406872469 is about 20171.0800157057. The cubic root of 406872469 is about 741.0020931886.

The spelling of 406872469 in words is "four hundred six million, eight hundred seventy-two thousand, four hundred sixty-nine".