190643 has 4 divisors (see below), whose sum is σ = 191568. Its totient is φ = 189720.

The previous prime is 190639. The next prime is 190649. The reversal of 190643 is 346091.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 190643 - 2² = 190639 is a prime.

It is a super-3 number, since 3×190643³ = 20786618495333121, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190649) 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, 5 + ... + 617.

It is an arithmetic number, because the mean of its divisors is an integer number (47892).

2¹⁹⁰⁶⁴³ is an apocalyptic number.

190643 is a deficient number, since it is larger than the sum of its proper divisors (925).

190643 is an equidigital number, since it uses as much as digits as its factorization.

190643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 190643 is about 436.6268429678. The cubic root of 190643 is about 57.5537493629.

The spelling of 190643 in words is "one hundred ninety thousand, six hundred forty-three".