1187083221 has 4 divisors (see below), whose sum is σ = 1582777632. Its totient is φ = 791388812.

The previous prime is 1187083211. The next prime is 1187083229. The reversal of 1187083221 is 1223807811.

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 1187083221 - 2¹¹ = 1187081173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187083229) 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, 197847201 + ... + 197847206.

It is an arithmetic number, because the mean of its divisors is an integer number (395694408).

Almost surely, 2^1187083221 is an apocalyptic number.

It is an amenable number.

1187083221 is a deficient number, since it is larger than the sum of its proper divisors (395694411).

1187083221 is an equidigital number, since it uses as much as digits as its factorization.

1187083221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395694410.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 1187083221 is about 34454.0740842066. The cubic root of 1187083221 is about 1058.8319936852.

The spelling of 1187083221 in words is "one billion, one hundred eighty-seven million, eighty-three thousand, two hundred twenty-one".