1355557889 has 4 divisors (see below), whose sum is σ = 1549209024. Its totient is φ = 1161906756.

The previous prime is 1355557873. The next prime is 1355557901. The reversal of 1355557889 is 9887555531.

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.

It is a cyclic number.

It is not a de Polignac number, because 1355557889 - 2⁴ = 1355557873 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1355553889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96825557 + ... + 96825570.

It is an arithmetic number, because the mean of its divisors is an integer number (387302256).

Almost surely, 2^1355557889 is an apocalyptic number.

It is an amenable number.

1355557889 is a deficient number, since it is larger than the sum of its proper divisors (193651135).

1355557889 is an equidigital number, since it uses as much as digits as its factorization.

1355557889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193651134.

The product of its digits is 7560000, while the sum is 56.

The square root of 1355557889 is about 36817.9017462973. The cubic root of 1355557889 is about 1106.7240720674.

The spelling of 1355557889 in words is "one billion, three hundred fifty-five million, five hundred fifty-seven thousand, eight hundred eighty-nine".