1189204971 has 4 divisors (see below), whose sum is σ = 1585606632. Its totient is φ = 792803312.

The previous prime is 1189204963. The next prime is 1189204987. The reversal of 1189204971 is 1794029811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1189204971 - 2³ = 1189204963 is a prime.

It is a super-2 number, since 2×1189204971² = 2828416926102221682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1189204271) 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, 198200826 + ... + 198200831.

It is an arithmetic number, because the mean of its divisors is an integer number (396401658).

Almost surely, 2^1189204971 is an apocalyptic number.

1189204971 is a deficient number, since it is larger than the sum of its proper divisors (396401661).

1189204971 is an equidigital number, since it uses as much as digits as its factorization.

1189204971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396401660.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1189204971 is about 34484.8513263433. The cubic root of 1189204971 is about 1059.4624576625.

The spelling of 1189204971 in words is "one billion, one hundred eighty-nine million, two hundred four thousand, nine hundred seventy-one".