116845609 has 4 divisors (see below), whose sum is σ = 117035604. Its totient is φ = 116655616.

The previous prime is 116845571. The next prime is 116845627. The reversal of 116845609 is 906548611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906548611 = 23 ⋅39415157.

It can be written as a sum of positive squares in 2 ways, for example, as 1755625 + 115089984 = 1325^2 + 10728^2 .

It is a cyclic number.

It is not a de Polignac number, because 116845609 - 2²¹ = 114748457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116845699) 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, 94072 + ... + 95305.

It is an arithmetic number, because the mean of its divisors is an integer number (29258901).

Almost surely, 2^116845609 is an apocalyptic number.

It is an amenable number.

116845609 is a deficient number, since it is larger than the sum of its proper divisors (189995).

116845609 is an equidigital number, since it uses as much as digits as its factorization.

116845609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189994.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 116845609 is about 10809.5147439652. The cubic root of 116845609 is about 488.8820954080.

The spelling of 116845609 in words is "one hundred sixteen million, eight hundred forty-five thousand, six hundred nine".