190640243 has 8 divisors (see below), whose sum is σ = 206098320. Its totient is φ = 175724640.

The previous prime is 190640221. The next prime is 190640251. The reversal of 190640243 is 342046091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 190640243 - 2⁶ = 190640179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190640213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134888 + ... + 136293.

It is an arithmetic number, because the mean of its divisors is an integer number (25762290).

Almost surely, 2^190640243 is an apocalyptic number.

190640243 is a deficient number, since it is larger than the sum of its proper divisors (15458077).

190640243 is a wasteful number, since it uses less digits than its factorization.

190640243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271237.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 190640243 is about 13807.2532750001. The cubic root of 190640243 is about 575.5347192208.

The spelling of 190640243 in words is "one hundred ninety million, six hundred forty thousand, two hundred forty-three".