1989735067 has 2 divisors, whose sum is σ = 1989735068. Its totient is φ = 1989735066.

The previous prime is 1989735017. The next prime is 1989735073. The reversal of 1989735067 is 7605379891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1989735067 - 2¹¹ = 1989733019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1989734999 and 1989735017.

It is not a weakly prime, because it can be changed into another prime (1989735017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994867533 + 994867534.

It is an arithmetic number, because the mean of its divisors is an integer number (994867534).

Almost surely, 2^1989735067 is an apocalyptic number.

1989735067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989735067 is an equidigital number, since it uses as much as digits as its factorization.

1989735067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 55.

The square root of 1989735067 is about 44606.4464735760. The cubic root of 1989735067 is about 1257.7618508048.

The spelling of 1989735067 in words is "one billion, nine hundred eighty-nine million, seven hundred thirty-five thousand, sixty-seven".