1081628897 has 4 divisors (see below), whose sum is σ = 1092338196. Its totient is φ = 1070919600.

The previous prime is 1081628869. The next prime is 1081628939. The reversal of 1081628897 is 7988261801.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1045616896 + 36012001 = 32336^2 + 6001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081628897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081624897) 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, 5354498 + ... + 5354699.

It is an arithmetic number, because the mean of its divisors is an integer number (273084549).

Almost surely, 2^1081628897 is an apocalyptic number.

It is an amenable number.

1081628897 is a deficient number, since it is larger than the sum of its proper divisors (10709299).

1081628897 is a wasteful number, since it uses less digits than its factorization.

1081628897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10709298.

The product of its (nonzero) digits is 387072, while the sum is 50.

The square root of 1081628897 is about 32888.1269913627. The cubic root of 1081628897 is about 1026.5011190293.

The spelling of 1081628897 in words is "one billion, eighty-one million, six hundred twenty-eight thousand, eight hundred ninety-seven".