119951891 has 4 divisors (see below), whose sum is σ = 123193872. Its totient is φ = 116709912.

The previous prime is 119951861. The next prime is 119951899. The reversal of 119951891 is 198159911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198159911 = 19 ⋅10429469.

It is a cyclic number.

It is not a de Polignac number, because 119951891 - 2¹⁰ = 119950867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (119951899) 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, 1620935 + ... + 1621008.

It is an arithmetic number, because the mean of its divisors is an integer number (30798468).

Almost surely, 2^119951891 is an apocalyptic number.

119951891 is a deficient number, since it is larger than the sum of its proper divisors (3241981).

119951891 is an equidigital number, since it uses as much as digits as its factorization.

119951891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241980.

The product of its digits is 29160, while the sum is 44.

The square root of 119951891 is about 10952.2550645974. The cubic root of 119951891 is about 493.1764910573.

The spelling of 119951891 in words is "one hundred nineteen million, nine hundred fifty-one thousand, eight hundred ninety-one".