191940074 has 4 divisors (see below), whose sum is σ = 287910114. Its totient is φ = 95970036.

The previous prime is 191940061. The next prime is 191940079. The reversal of 191940074 is 470049191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470049191 = 397 ⋅1184003.

It can be written as a sum of positive squares in only one way, i.e., 183196225 + 8743849 = 13535^2 + 2957^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (191940079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47985017 + ... + 47985020.

Almost surely, 2^191940074 is an apocalyptic number.

191940074 is a deficient number, since it is larger than the sum of its proper divisors (95970040).

191940074 is an equidigital number, since it uses as much as digits as its factorization.

191940074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95970039.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 191940074 is about 13854.2438985316. The cubic root of 191940074 is about 576.8398022611.

The spelling of 191940074 in words is "one hundred ninety-one million, nine hundred forty thousand, seventy-four".