1188152397 has 6 divisors (see below), whose sum is σ = 1716220142. Its totient is φ = 792101592.

The previous prime is 1188152369. The next prime is 1188152431. The reversal of 1188152397 is 7932518811.

1188152397 is a `hidden beast` number, since 118 + 8 + 1 + 523 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 842973156 + 345179241 = 29034^2 + 18579^2 .

It is not a de Polignac number, because 1188152397 - 2⁶ = 1188152333 is a prime.

It is a super-2 number, since 2×1188152397² = 2823412236993691218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188152297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66008458 + ... + 66008475.

Almost surely, 2^1188152397 is an apocalyptic number.

It is an amenable number.

1188152397 is a deficient number, since it is larger than the sum of its proper divisors (528067745).

1188152397 is a wasteful number, since it uses less digits than its factorization.

1188152397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132016939 (or 132016936 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1188152397 is about 34469.5865510453. The cubic root of 1188152397 is about 1059.1497860769.

The spelling of 1188152397 in words is "one billion, one hundred eighty-eight million, one hundred fifty-two thousand, three hundred ninety-seven".