400774441 has 2 divisors, whose sum is σ = 400774442. Its totient is φ = 400774440.

The previous prime is 400774427. The next prime is 400774459. The reversal of 400774441 is 144477004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385533225 + 15241216 = 19635^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 400774441 - 2⁷ = 400774313 is a prime.

It is a Chen prime.

It is equal to p_21375373 and since 400774441 and 21375373 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (400774421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200387220 + 200387221.

It is an arithmetic number, because the mean of its divisors is an integer number (200387221).

Almost surely, 2^400774441 is an apocalyptic number.

It is an amenable number.

400774441 is a deficient number, since it is larger than the sum of its proper divisors (1).

400774441 is an equidigital number, since it uses as much as digits as its factorization.

400774441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 400774441 is about 20019.3516628286. The cubic root of 400774441 is about 737.2815040181.

The spelling of 400774441 in words is "four hundred million, seven hundred seventy-four thousand, four hundred forty-one".