1683654168949 has 2 divisors, whose sum is σ = 1683654168950. Its totient is φ = 1683654168948.

The previous prime is 1683654168877. The next prime is 1683654168953. The reversal of 1683654168949 is 9498614563861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1622604654225 + 61049514724 = 1273815^2 + 247082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683654168949 - 2⁹ = 1683654168437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1683654160949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841827084474 + 841827084475.

It is an arithmetic number, because the mean of its divisors is an integer number (841827084475).

Almost surely, 2^{1683654168949} is an apocalyptic number.

It is an amenable number.

1683654168949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683654168949 is an equidigital number, since it uses as much as digits as its factorization.

1683654168949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268738560, while the sum is 70.

The spelling of 1683654168949 in words is "one trillion, six hundred eighty-three billion, six hundred fifty-four million, one hundred sixty-eight thousand, nine hundred forty-nine".