400401427 has 2 divisors, whose sum is σ = 400401428. Its totient is φ = 400401426.

The previous prime is 400401403. The next prime is 400401431. The reversal of 400401427 is 724104004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400401427 - 2¹⁹ = 399877139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400401398 and 400401407.

It is not a weakly prime, because it can be changed into another prime (400461427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200200713 + 200200714.

It is an arithmetic number, because the mean of its divisors is an integer number (200200714).

Almost surely, 2^400401427 is an apocalyptic number.

400401427 is a deficient number, since it is larger than the sum of its proper divisors (1).

400401427 is an equidigital number, since it uses as much as digits as its factorization.

400401427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 400401427 is about 20010.0331583933. The cubic root of 400401427 is about 737.0526956069.

The spelling of 400401427 in words is "four hundred million, four hundred one thousand, four hundred twenty-seven".