9190919191901 has 2 divisors, whose sum is σ = 9190919191902. Its totient is φ = 9190919191900.

The previous prime is 9190919191897. The next prime is 9190919191933. The reversal of 9190919191901 is 1091919190919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7832307487876 + 1358611704025 = 2798626^2 + 1165595^2 .

It is a cyclic number.

It is not a de Polignac number, because 9190919191901 - 2² = 9190919191897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9190919191801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4595459595950 + 4595459595951.

It is an arithmetic number, because the mean of its divisors is an integer number (4595459595951).

Almost surely, 2^{9190919191901} is an apocalyptic number.

It is an amenable number.

9190919191901 is a deficient number, since it is larger than the sum of its proper divisors (1).

9190919191901 is an equidigital number, since it uses as much as digits as its factorization.

9190919191901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 531441, while the sum is 59.

The spelling of 9190919191901 in words is "nine trillion, one hundred ninety billion, nine hundred nineteen million, one hundred ninety-one thousand, nine hundred one".