117891473 has 4 divisors (see below), whose sum is σ = 134733120. Its totient is φ = 101049828.

The previous prime is 117891469. The next prime is 117891493. The reversal of 117891473 is 374198711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117891473 - 2² = 117891469 is a prime.

It is a super-2 number, since 2×117891473² = 27796798812219458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117891473.

It is not an unprimeable number, because it can be changed into a prime (117891493) 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, 8420813 + ... + 8420826.

It is an arithmetic number, because the mean of its divisors is an integer number (33683280).

Almost surely, 2^117891473 is an apocalyptic number.

It is an amenable number.

117891473 is a deficient number, since it is larger than the sum of its proper divisors (16841647).

117891473 is an equidigital number, since it uses as much as digits as its factorization.

117891473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16841646.

The product of its digits is 42336, while the sum is 41.

The square root of 117891473 is about 10857.7839820103. The cubic root of 117891473 is about 490.3363967966.

The spelling of 117891473 in words is "one hundred seventeen million, eight hundred ninety-one thousand, four hundred seventy-three".