1083891901 has 2 divisors, whose sum is σ = 1083891902. Its totient is φ = 1083891900.

The previous prime is 1083891881. The next prime is 1083891911. The reversal of 1083891901 is 1091983801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1082475801 + 1416100 = 32901^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1083891901 - 2⁵ = 1083891869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1083891911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541945950 + 541945951.

It is an arithmetic number, because the mean of its divisors is an integer number (541945951).

Almost surely, 2^1083891901 is an apocalyptic number.

It is an amenable number.

1083891901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1083891901 is an equidigital number, since it uses as much as digits as its factorization.

1083891901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 1083891901 is about 32922.5135887283. The cubic root of 1083891901 is about 1027.2165085581.

The spelling of 1083891901 in words is "one billion, eighty-three million, eight hundred ninety-one thousand, nine hundred one".