1401404009 has 4 divisors (see below), whose sum is σ = 1405006980. Its totient is φ = 1397801040.

The previous prime is 1401403981. The next prime is 1401404021. The reversal of 1401404009 is 9004041041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426216025 + 975187984 = 20645^2 + 31228^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401404009 - 2¹⁶ = 1401338473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401404209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800902 + ... + 1801679.

It is an arithmetic number, because the mean of its divisors is an integer number (351251745).

Almost surely, 2^1401404009 is an apocalyptic number.

It is an amenable number.

1401404009 is a deficient number, since it is larger than the sum of its proper divisors (3602971).

1401404009 is an equidigital number, since it uses as much as digits as its factorization.

1401404009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602970.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1401404009 is about 37435.3310256501. The cubic root of 1401404009 is about 1119.0627812686.

The spelling of 1401404009 in words is "one billion, four hundred one million, four hundred four thousand, nine".