401024009 has 2 divisors, whose sum is σ = 401024010. Its totient is φ = 401024008.

The previous prime is 401023991. The next prime is 401024017. The reversal of 401024009 is 900420104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333865984 + 67158025 = 18272^2 + 8195^2 .

It is a cyclic number.

It is not a de Polignac number, because 401024009 - 2²⁸ = 132588553 is a prime.

It is not a weakly prime, because it can be changed into another prime (401024059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200512004 + 200512005.

It is an arithmetic number, because the mean of its divisors is an integer number (200512005).

Almost surely, 2^401024009 is an apocalyptic number.

It is an amenable number.

401024009 is a deficient number, since it is larger than the sum of its proper divisors (1).

401024009 is an equidigital number, since it uses as much as digits as its factorization.

401024009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 401024009 is about 20025.5838616506. The cubic root of 401024009 is about 737.4345108563.

The spelling of 401024009 in words is "four hundred one million, twenty-four thousand, nine".