1793138261 has 2 divisors, whose sum is σ = 1793138262. Its totient is φ = 1793138260.

The previous prime is 1793138231. The next prime is 1793138267. The reversal of 1793138261 is 1628313971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1512743236 + 280395025 = 38894^2 + 16745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1793138261 - 2¹⁴ = 1793121877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1793138267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 896569130 + 896569131.

It is an arithmetic number, because the mean of its divisors is an integer number (896569131).

Almost surely, 2^1793138261 is an apocalyptic number.

It is an amenable number.

1793138261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1793138261 is an equidigital number, since it uses as much as digits as its factorization.

1793138261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 1793138261 is about 42345.4632871102. The cubic root of 1793138261 is about 1214.8927092285.

The spelling of 1793138261 in words is "one billion, seven hundred ninety-three million, one hundred thirty-eight thousand, two hundred sixty-one".