190101001 has 2 divisors, whose sum is σ = 190101002. Its totient is φ = 190101000.

The previous prime is 190100951. The next prime is 190101007. The reversal of 190101001 is 100101091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119137225 + 70963776 = 10915^2 + 8424^2 .

It is an emirp because it is prime and its reverse (100101091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190101001 - 2⁹ = 190100489 is a prime.

It is a super-2 number, since 2×190101001² = 72276781162404002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190101007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95050500 + 95050501.

It is an arithmetic number, because the mean of its divisors is an integer number (95050501).

Almost surely, 2^190101001 is an apocalyptic number.

It is an amenable number.

190101001 is a deficient number, since it is larger than the sum of its proper divisors (1).

190101001 is an equidigital number, since it uses as much as digits as its factorization.

190101001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 190101001 is about 13787.7119566663. The cubic root of 190101001 is about 574.9915572799.

Adding to 190101001 its reverse (100101091), we get a palindrome (290202092).

The spelling of 190101001 in words is "one hundred ninety million, one hundred one thousand, one".