1900091441 has 2 divisors, whose sum is σ = 1900091442. Its totient is φ = 1900091440.

The previous prime is 1900091423. The next prime is 1900091443. The reversal of 1900091441 is 1441900091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1673137216 + 226954225 = 40904^2 + 15065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900091441 - 2¹⁸ = 1899829297 is a prime.

It is a super-2 number, since 2×1900091441² = 7220694968322912962, which contains 22 as substring.

Together with 1900091443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1900091443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950045720 + 950045721.

It is an arithmetic number, because the mean of its divisors is an integer number (950045721).

Almost surely, 2^1900091441 is an apocalyptic number.

It is an amenable number.

1900091441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900091441 is an equidigital number, since it uses as much as digits as its factorization.

1900091441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1900091441 is about 43590.0383229930. The cubic root of 1900091441 is about 1238.5821986760.

The spelling of 1900091441 in words is "one billion, nine hundred million, ninety-one thousand, four hundred forty-one".