1861413223 has 4 divisors (see below), whose sum is σ = 1959382360. Its totient is φ = 1763444088.

The previous prime is 1861413209. The next prime is 1861413241. The reversal of 1861413223 is 3223141681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3223141681 = 5309 ⋅607109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1861413223 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 (1861413523) 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, 48984540 + ... + 48984577.

It is an arithmetic number, because the mean of its divisors is an integer number (489845590).

Almost surely, 2^1861413223 is an apocalyptic number.

1861413223 is a deficient number, since it is larger than the sum of its proper divisors (97969137).

1861413223 is an equidigital number, since it uses as much as digits as its factorization.

1861413223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97969136.

The product of its digits is 6912, while the sum is 31.

The square root of 1861413223 is about 43144.0983565539. The cubic root of 1861413223 is about 1230.1203361236.

The spelling of 1861413223 in words is "one billion, eight hundred sixty-one million, four hundred thirteen thousand, two hundred twenty-three".