190101 has 4 divisors (see below), whose sum is σ = 253472. Its totient is φ = 126732.

The previous prime is 190097. The next prime is 190121. The reversal of 190101 is 101091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 190101 - 2² = 190097 is a prime.

It is a super-2 number, since 2×190101² = 72276780402, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

190101 is a modest number, since divided by 101 gives 19 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190121) 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, 31681 + ... + 31686.

It is an arithmetic number, because the mean of its divisors is an integer number (63368).

2¹⁹⁰¹⁰¹ is an apocalyptic number.

It is an amenable number.

190101 is a deficient number, since it is larger than the sum of its proper divisors (63371).

190101 is an equidigital number, since it uses as much as digits as its factorization.

190101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63370.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 190101 is about 436.0057339073. The cubic root of 190101 is about 57.4991556272.

Adding to 190101 its reverse (101091), we get a palindrome (291192).

The spelling of 190101 in words is "one hundred ninety thousand, one hundred one".