119655991 has 12 divisors (see below), whose sum is σ = 149899512. Its totient is φ = 94672368.

The previous prime is 119655989. The next prime is 119655997. The reversal of 119655991 is 199556911.

It is not a de Polignac number, because 119655991 - 2¹ = 119655989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (119655997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93285 + ... + 94558.

It is an arithmetic number, because the mean of its divisors is an integer number (12491626).

Almost surely, 2^119655991 is an apocalyptic number.

119655991 is a deficient number, since it is larger than the sum of its proper divisors (30243521).

119655991 is a wasteful number, since it uses less digits than its factorization.

119655991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187870 (or 187863 counting only the distinct ones).

The product of its digits is 109350, while the sum is 46.

The square root of 119655991 is about 10938.7380899261. The cubic root of 119655991 is about 492.7706308901.

It can be divided in two parts, 11965 and 5991, that added together give a square (17956 = 134²).

The spelling of 119655991 in words is "one hundred nineteen million, six hundred fifty-five thousand, nine hundred ninety-one".