1009161243 has 12 divisors (see below), whose sum is σ = 1459219320. Its totient is φ = 672062496.

The previous prime is 1009161239. The next prime is 1009161253. The reversal of 1009161243 is 3421619001.

1009161243 is a `hidden beast` number, since 1 + 0 + 0 + 9 + 1 + 612 + 43 = 666.

It is not a de Polignac number, because 1009161243 - 2² = 1009161239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1009161203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50253 + ... + 67406.

It is an arithmetic number, because the mean of its divisors is an integer number (121601610).

Almost surely, 2^1009161243 is an apocalyptic number.

1009161243 is a deficient number, since it is larger than the sum of its proper divisors (450058077).

1009161243 is a wasteful number, since it uses less digits than its factorization.

1009161243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118618 (or 118615 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1009161243 is about 31767.2983270532. The cubic root of 1009161243 is about 1003.0444694661.

The spelling of 1009161243 in words is "one billion, nine million, one hundred sixty-one thousand, two hundred forty-three".