8435389409 has 4 divisors (see below), whose sum is σ = 8931588804. Its totient is φ = 7939190016.

The previous prime is 8435389363. The next prime is 8435389429. The reversal of 8435389409 is 9049835348.

It is a happy number.

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 5256685009 + 3178704400 = 72503^2 + 56380^2 .

It is a cyclic number.

It is not a de Polignac number, because 8435389409 - 2¹² = 8435385313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8435389429) 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, 248099672 + ... + 248099705.

It is an arithmetic number, because the mean of its divisors is an integer number (2232897201).

Almost surely, 2^8435389409 is an apocalyptic number.

It is an amenable number.

8435389409 is a deficient number, since it is larger than the sum of its proper divisors (496199395).

8435389409 is a wasteful number, since it uses less digits than its factorization.

8435389409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496199394.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The square root of 8435389409 is about 91844.3760335928. The cubic root of 8435389409 is about 2035.6434493898.

The spelling of 8435389409 in words is "eight billion, four hundred thirty-five million, three hundred eighty-nine thousand, four hundred nine".