1201820183 has 4 divisors (see below), whose sum is σ = 1240588608. Its totient is φ = 1163051760.

The previous prime is 1201820159. The next prime is 1201820197. The reversal of 1201820183 is 3810281021.

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 1201820183 - 2⁶ = 1201820119 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 (1201820483) 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, 19384166 + ... + 19384227.

It is an arithmetic number, because the mean of its divisors is an integer number (310147152).

Almost surely, 2^1201820183 is an apocalyptic number.

1201820183 is a deficient number, since it is larger than the sum of its proper divisors (38768425).

1201820183 is an equidigital number, since it uses as much as digits as its factorization.

1201820183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38768424.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1201820183 is about 34667.2782750536. The cubic root of 1201820183 is about 1063.1955847174.

The spelling of 1201820183 in words is "one billion, two hundred one million, eight hundred twenty thousand, one hundred eighty-three".