1983280337917 has 2 divisors, whose sum is σ = 1983280337918. Its totient is φ = 1983280337916.

The previous prime is 1983280337903. The next prime is 1983280337921. The reversal of 1983280337917 is 7197330823891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1830660414361 + 152619923556 = 1353019^2 + 390666^2 .

It is a cyclic number.

It is not a de Polignac number, because 1983280337917 - 2³¹ = 1981132854269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1983280337117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991640168958 + 991640168959.

It is an arithmetic number, because the mean of its divisors is an integer number (991640168959).

Almost surely, 2^{1983280337917} is an apocalyptic number.

It is an amenable number.

1983280337917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983280337917 is an equidigital number, since it uses as much as digits as its factorization.

1983280337917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 1983280337917 in words is "one trillion, nine hundred eighty-three billion, two hundred eighty million, three hundred thirty-seven thousand, nine hundred seventeen".