1355712769 has 4 divisors (see below), whose sum is σ = 1362138160. Its totient is φ = 1349287380.

The previous prime is 1355712763. The next prime is 1355712803. The reversal of 1355712769 is 9672175531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9672175531 = 131 ⋅73833401.

It is a cyclic number.

It is not a de Polignac number, because 1355712769 - 2¹¹ = 1355710721 is a prime.

It is a super-2 number, since 2×1355712769² = 3675914224059294722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355712763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3212379 + ... + 3212800.

It is an arithmetic number, because the mean of its divisors is an integer number (340534540).

Almost surely, 2^1355712769 is an apocalyptic number.

It is an amenable number.

1355712769 is a deficient number, since it is larger than the sum of its proper divisors (6425391).

1355712769 is an equidigital number, since it uses as much as digits as its factorization.

1355712769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425390.

The product of its digits is 396900, while the sum is 46.

The square root of 1355712769 is about 36820.0050108633. The cubic root of 1355712769 is about 1106.7662202480.

The spelling of 1355712769 in words is "one billion, three hundred fifty-five million, seven hundred twelve thousand, seven hundred sixty-nine".