1180672391 has 4 divisors (see below), whose sum is σ = 1189969152. Its totient is φ = 1171375632.

The previous prime is 1180672387. The next prime is 1180672399. The reversal of 1180672391 is 1932760811.

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 1180672391 - 2² = 1180672387 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 (1180672399) 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, 4648190 + ... + 4648443.

It is an arithmetic number, because the mean of its divisors is an integer number (297492288).

Almost surely, 2^1180672391 is an apocalyptic number.

1180672391 is a deficient number, since it is larger than the sum of its proper divisors (9296761).

1180672391 is an equidigital number, since it uses as much as digits as its factorization.

1180672391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9296760.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1180672391 is about 34360.9137102028. The cubic root of 1180672391 is about 1056.9224819015.

The spelling of 1180672391 in words is "one billion, one hundred eighty million, six hundred seventy-two thousand, three hundred ninety-one".