400854469 has 2 divisors, whose sum is σ = 400854470. Its totient is φ = 400854468.

The previous prime is 400854401. The next prime is 400854497. The reversal of 400854469 is 964458004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397523844 + 3330625 = 19938^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 400854469 - 2⁷ = 400854341 is a prime.

It is a super-2 number, since 2×400854469² = 321368610634543922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400824469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200427234 + 200427235.

It is an arithmetic number, because the mean of its divisors is an integer number (200427235).

Almost surely, 2^400854469 is an apocalyptic number.

It is an amenable number.

400854469 is a deficient number, since it is larger than the sum of its proper divisors (1).

400854469 is an equidigital number, since it uses as much as digits as its factorization.

400854469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 400854469 is about 20021.3503290862. The cubic root of 400854469 is about 737.3305750427.

The spelling of 400854469 in words is "four hundred million, eight hundred fifty-four thousand, four hundred sixty-nine".