400966849 has 2 divisors, whose sum is σ = 400966850. Its totient is φ = 400966848.

The previous prime is 400966799. The next prime is 400966859. The reversal of 400966849 is 948669004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326886400 + 74080449 = 18080^2 + 8607^2 .

It is a cyclic number.

It is not a de Polignac number, because 400966849 - 2⁷ = 400966721 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 400966799 and 400966808.

It is not a weakly prime, because it can be changed into another prime (400966859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200483424 + 200483425.

It is an arithmetic number, because the mean of its divisors is an integer number (200483425).

Almost surely, 2^400966849 is an apocalyptic number.

It is an amenable number.

400966849 is a deficient number, since it is larger than the sum of its proper divisors (1).

400966849 is an equidigital number, since it uses as much as digits as its factorization.

400966849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 400966849 is about 20024.1566364229. The cubic root of 400966849 is about 737.3994724225.

The spelling of 400966849 in words is "four hundred million, nine hundred sixty-six thousand, eight hundred forty-nine".