116121709 has 4 divisors (see below), whose sum is σ = 126678240. Its totient is φ = 105565180.

The previous prime is 116121701. The next prime is 116121721. The reversal of 116121709 is 907121611.

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, and also an emirpimes, since its reverse is a distinct semiprime: 907121611 = 11 ⋅82465601.

It is a cyclic number.

It is not a de Polignac number, because 116121709 - 2³ = 116121701 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 (116121701) 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, 5278249 + ... + 5278270.

It is an arithmetic number, because the mean of its divisors is an integer number (31669560).

Almost surely, 2^116121709 is an apocalyptic number.

It is an amenable number.

116121709 is a deficient number, since it is larger than the sum of its proper divisors (10556531).

116121709 is a wasteful number, since it uses less digits than its factorization.

116121709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556530.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 116121709 is about 10775.9783314556. The cubic root of 116121709 is about 487.8704039210.

The spelling of 116121709 in words is "one hundred sixteen million, one hundred twenty-one thousand, seven hundred nine".