117887749 has 4 divisors (see below), whose sum is σ = 134728864. Its totient is φ = 101046636.

The previous prime is 117887747. The next prime is 117887753. The reversal of 117887749 is 947788711.

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 117887749 - 2¹ = 117887747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117887696 and 117887705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117887747) 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, 8420547 + ... + 8420560.

It is an arithmetic number, because the mean of its divisors is an integer number (33682216).

Almost surely, 2^117887749 is an apocalyptic number.

It is an amenable number.

117887749 is a deficient number, since it is larger than the sum of its proper divisors (16841115).

117887749 is an equidigital number, since it uses as much as digits as its factorization.

117887749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16841114.

The product of its digits is 790272, while the sum is 52.

The square root of 117887749 is about 10857.6124907827. The cubic root of 117887749 is about 490.3312337657.

The spelling of 117887749 in words is "one hundred seventeen million, eight hundred eighty-seven thousand, seven hundred forty-nine".