1161947138 has 8 divisors (see below), whose sum is σ = 1901368080. Its totient is φ = 528157780.

The previous prime is 1161947131. The next prime is 1161947141. The reversal of 1161947138 is 8317491611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1161947095 and 1161947104.

It is not an unprimeable number, because it can be changed into a prime (1161947131) 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, 26407868 + ... + 26407911.

It is an arithmetic number, because the mean of its divisors is an integer number (237671010).

Almost surely, 2^1161947138 is an apocalyptic number.

1161947138 is a deficient number, since it is larger than the sum of its proper divisors (739420942).

1161947138 is a wasteful number, since it uses less digits than its factorization.

1161947138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52815792.

The product of its digits is 36288, while the sum is 41.

The square root of 1161947138 is about 34087.3457165559. The cubic root of 1161947138 is about 1051.3051458952.

The spelling of 1161947138 in words is "one billion, one hundred sixty-one million, nine hundred forty-seven thousand, one hundred thirty-eight".