1355000891 has 4 divisors (see below), whose sum is σ = 1355387952. Its totient is φ = 1354613832.

The previous prime is 1355000879. The next prime is 1355000897. The reversal of 1355000891 is 1980005531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355000891 is a prime.

It is a super-2 number, since 2×1355000891² = 3672054829221587762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355000897) 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, 188231 + ... + 195296.

It is an arithmetic number, because the mean of its divisors is an integer number (338846988).

Almost surely, 2^1355000891 is an apocalyptic number.

1355000891 is a deficient number, since it is larger than the sum of its proper divisors (387061).

1355000891 is an equidigital number, since it uses as much as digits as its factorization.

1355000891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387060.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1355000891 is about 36810.3367411927. The cubic root of 1355000891 is about 1106.5724671941.

The spelling of 1355000891 in words is "one billion, three hundred fifty-five million, eight hundred ninety-one", and thus it is an aban number.