1353944521 has 2 divisors, whose sum is σ = 1353944522. Its totient is φ = 1353944520.

The previous prime is 1353944479. The next prime is 1353944533. The reversal of 1353944521 is 1254493531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887384521 + 466560000 = 29789^2 + 21600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353944521 - 2¹⁷ = 1353813449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1353944551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676972260 + 676972261.

It is an arithmetic number, because the mean of its divisors is an integer number (676972261).

Almost surely, 2^1353944521 is an apocalyptic number.

It is an amenable number.

1353944521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1353944521 is an equidigital number, since it uses as much as digits as its factorization.

1353944521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 1353944521 is about 36795.9851206623. The cubic root of 1353944521 is about 1106.2848280565.

The spelling of 1353944521 in words is "one billion, three hundred fifty-three million, nine hundred forty-four thousand, five hundred twenty-one".