117447509 has 16 divisors (see below), whose sum is σ = 129853296. Its totient is φ = 105753600.

The previous prime is 117447487. The next prime is 117447511. The reversal of 117447509 is 905744711.

117447509 = T₂₆₉ + T₂₇₀ + ... + T₈₉₇.

It can be written as a sum of positive squares in 8 ways, for example, as 14364100 + 103083409 = 3790^2 + 10153^2 .

It is not a de Polignac number, because 117447509 - 2¹² = 117443413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117447529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36839 + ... + 39899.

It is an arithmetic number, because the mean of its divisors is an integer number (8115831).

Almost surely, 2^117447509 is an apocalyptic number.

It is an amenable number.

117447509 is a deficient number, since it is larger than the sum of its proper divisors (12405787).

117447509 is a wasteful number, since it uses less digits than its factorization.

117447509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 117447509 is about 10837.3201945869. The cubic root of 117447509 is about 489.7201080979.

The spelling of 117447509 in words is "one hundred seventeen million, four hundred forty-seven thousand, five hundred nine".