19671983 has 2 divisors, whose sum is σ = 19671984. Its totient is φ = 19671982.

The previous prime is 19671979. The next prime is 19671997. The reversal of 19671983 is 38917691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19671983 - 2² = 19671979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19670983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9835991 + 9835992.

It is an arithmetic number, because the mean of its divisors is an integer number (9835992).

Almost surely, 2^19671983 is an apocalyptic number.

19671983 is a deficient number, since it is larger than the sum of its proper divisors (1).

19671983 is an equidigital number, since it uses as much as digits as its factorization.

19671983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 19671983 is about 4435.3109248394. The cubic root of 19671983 is about 269.9496156556.

The spelling of 19671983 in words is "nineteen million, six hundred seventy-one thousand, nine hundred eighty-three".