1151187197 has 4 divisors (see below), whose sum is σ = 1152243456. Its totient is φ = 1150130940.

The previous prime is 1151187137. The next prime is 1151187203. The reversal of 1151187197 is 7917811511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1151187197 - 2¹⁸ = 1150925053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151187137) 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, 526493 + ... + 528674.

It is an arithmetic number, because the mean of its divisors is an integer number (288060864).

Almost surely, 2^1151187197 is an apocalyptic number.

It is an amenable number.

1151187197 is a deficient number, since it is larger than the sum of its proper divisors (1056259).

1151187197 is a wasteful number, since it uses less digits than its factorization.

1151187197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056258.

The product of its digits is 17640, while the sum is 41.

The square root of 1151187197 is about 33929.1496651478. The cubic root of 1151187197 is about 1048.0499549469.

The spelling of 1151187197 in words is "one billion, one hundred fifty-one million, one hundred eighty-seven thousand, one hundred ninety-seven".