1654134109 has 2 divisors, whose sum is σ = 1654134110. Its totient is φ = 1654134108.

The previous prime is 1654134101. The next prime is 1654134127. The reversal of 1654134109 is 9014314561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1051186084 + 602948025 = 32422^2 + 24555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1654134109 - 2³ = 1654134101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1654134101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827067054 + 827067055.

It is an arithmetic number, because the mean of its divisors is an integer number (827067055).

Almost surely, 2^1654134109 is an apocalyptic number.

It is an amenable number.

1654134109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1654134109 is an equidigital number, since it uses as much as digits as its factorization.

1654134109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1654134109 is about 40671.0475522822. The cubic root of 1654134109 is about 1182.6518233459.

The spelling of 1654134109 in words is "one billion, six hundred fifty-four million, one hundred thirty-four thousand, one hundred nine".