1353686261 has 2 divisors, whose sum is σ = 1353686262. Its totient is φ = 1353686260.

The previous prime is 1353686249. The next prime is 1353686287. The reversal of 1353686261 is 1626863531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1309716100 + 43970161 = 36190^2 + 6631^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353686261 - 2¹⁰ = 1353685237 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 (1353685261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676843130 + 676843131.

It is an arithmetic number, because the mean of its divisors is an integer number (676843131).

Almost surely, 2^1353686261 is an apocalyptic number.

It is an amenable number.

1353686261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1353686261 is an equidigital number, since it uses as much as digits as its factorization.

1353686261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 1353686261 is about 36792.4756030360. The cubic root of 1353686261 is about 1106.2144836459.

The spelling of 1353686261 in words is "one billion, three hundred fifty-three million, six hundred eighty-six thousand, two hundred sixty-one".