1355842493 has 2 divisors, whose sum is σ = 1355842494. Its totient is φ = 1355842492.

The previous prime is 1355842409. The next prime is 1355842573. The reversal of 1355842493 is 3942485531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1310657209 + 45185284 = 36203^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355842493 - 2¹⁰ = 1355841469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355842403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677921246 + 677921247.

It is an arithmetic number, because the mean of its divisors is an integer number (677921247).

Almost surely, 2^1355842493 is an apocalyptic number.

It is an amenable number.

1355842493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355842493 is an equidigital number, since it uses as much as digits as its factorization.

1355842493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 1355842493 is about 36821.7665654433. The cubic root of 1355842493 is about 1106.8015201447.

The spelling of 1355842493 in words is "one billion, three hundred fifty-five million, eight hundred forty-two thousand, four hundred ninety-three".