43401404009 has 4 divisors (see below), whose sum is σ = 43524354516. Its totient is φ = 43278453504.

The previous prime is 43401403987. The next prime is 43401404017. The reversal of 43401404009 is 90040410434.

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 10029421609 + 33371982400 = 100147^2 + 182680^2 .

It is a cyclic number.

It is not a de Polignac number, because 43401404009 - 2²⁸ = 43132968553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43401404029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61474724 + ... + 61475429.

It is an arithmetic number, because the mean of its divisors is an integer number (10881088629).

Almost surely, 2^43401404009 is an apocalyptic number.

It is an amenable number.

43401404009 is a deficient number, since it is larger than the sum of its proper divisors (122950507).

43401404009 is a wasteful number, since it uses less digits than its factorization.

43401404009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122950506.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 43401404009 in words is "forty-three billion, four hundred one million, four hundred four thousand, nine".