1147238091 has 24 divisors (see below), whose sum is σ = 1731758496. Its totient is φ = 730477440.

The previous prime is 1147238089. The next prime is 1147238129. The reversal of 1147238091 is 1908327411.

It is a happy number.

It is not a de Polignac number, because 1147238091 - 2¹ = 1147238089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1147238011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147951 + ... + 155511.

It is an arithmetic number, because the mean of its divisors is an integer number (72156604).

Almost surely, 2^1147238091 is an apocalyptic number.

1147238091 is a deficient number, since it is larger than the sum of its proper divisors (584520405).

1147238091 is a wasteful number, since it uses less digits than its factorization.

1147238091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323 (or 8320 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1147238091 is about 33870.9033094779. The cubic root of 1147238091 is about 1046.8501494610.

The spelling of 1147238091 in words is "one billion, one hundred forty-seven million, two hundred thirty-eight thousand, ninety-one".