1089405971 has 16 divisors (see below), whose sum is σ = 1162536960. Its totient is φ = 1018686240.

The previous prime is 1089405949. The next prime is 1089405991. The reversal of 1089405971 is 1795049801.

It is a cyclic number.

It is not a de Polignac number, because 1089405971 - 2¹⁰ = 1089404947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089405931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184241 + ... + 190061.

It is an arithmetic number, because the mean of its divisors is an integer number (72658560).

Almost surely, 2^1089405971 is an apocalyptic number.

1089405971 is a deficient number, since it is larger than the sum of its proper divisors (73130989).

1089405971 is a wasteful number, since it uses less digits than its factorization.

1089405971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6026.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1089405971 is about 33006.1505025957. The cubic root of 1089405971 is about 1028.9554783268.

The spelling of 1089405971 in words is "one billion, eighty-nine million, four hundred five thousand, nine hundred seventy-one".