19983091 has 2 divisors, whose sum is σ = 19983092. Its totient is φ = 19983090.

The previous prime is 19983077. The next prime is 19983101. The reversal of 19983091 is 19038991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19983091 - 2⁹ = 19982579 is a prime.

It is equal to p_1269589 and since 19983091 and 1269589 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (19983011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9991545 + 9991546.

It is an arithmetic number, because the mean of its divisors is an integer number (9991546).

Almost surely, 2^19983091 is an apocalyptic number.

19983091 is a deficient number, since it is larger than the sum of its proper divisors (1).

19983091 is an equidigital number, since it uses as much as digits as its factorization.

19983091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 19983091 is about 4470.2450715816. The cubic root of 19983091 is about 271.3652432788.

The spelling of 19983091 in words is "nineteen million, nine hundred eighty-three thousand, ninety-one".