190108901 has 2 divisors, whose sum is σ = 190108902. Its totient is φ = 190108900.

The previous prime is 190108871. The next prime is 190108969. The reversal of 190108901 is 109801091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177156100 + 12952801 = 13310^2 + 3599^2 .

It is a cyclic number.

It is not a de Polignac number, because 190108901 - 2⁶ = 190108837 is a prime.

It is a super-2 number, since 2×190108901² = 72282788478855602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190108991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95054450 + 95054451.

It is an arithmetic number, because the mean of its divisors is an integer number (95054451).

Almost surely, 2^190108901 is an apocalyptic number.

It is an amenable number.

190108901 is a deficient number, since it is larger than the sum of its proper divisors (1).

190108901 is an equidigital number, since it uses as much as digits as its factorization.

190108901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 190108901 is about 13787.9984406730. The cubic root of 190108901 is about 574.9995221168. Note that the first 3 decimals are identical.

Adding to 190108901 its reverse (109801091), we get a palindrome (299909992).

The spelling of 190108901 in words is "one hundred ninety million, one hundred eight thousand, nine hundred one".