117781098 has 8 divisors (see below), whose sum is σ = 235562208. Its totient is φ = 39260364.

The previous prime is 117781061. The next prime is 117781099. The reversal of 117781098 is 890187711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

117781098 is an admirable number.

It is a super-3 number, since 3×117781098³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (117781099) 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, 9815086 + ... + 9815097.

It is an arithmetic number, because the mean of its divisors is an integer number (29445276).

Almost surely, 2^117781098 is an apocalyptic number.

117781098 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117781098 is a wasteful number, since it uses less digits than its factorization.

117781098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19630188.

The product of its (nonzero) digits is 28224, while the sum is 42.

The square root of 117781098 is about 10852.7000327108. The cubic root of 117781098 is about 490.1833244347.

The spelling of 117781098 in words is "one hundred seventeen million, seven hundred eighty-one thousand, ninety-eight".