1858472101 has 4 divisors (see below), whose sum is σ = 1879353900. Its totient is φ = 1837590304.

The previous prime is 1858472089. The next prime is 1858472123. The reversal of 1858472101 is 1012748581.

It is a Cunningham number, because it is equal to 43110²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 356832100 + 1501640001 = 18890^2 + 38751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1858472101 - 2⁵ = 1858472069 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 (1858472131) 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, 10440766 + ... + 10440943.

It is an arithmetic number, because the mean of its divisors is an integer number (469838475).

Almost surely, 2^1858472101 is an apocalyptic number.

It is an amenable number.

1858472101 is a deficient number, since it is larger than the sum of its proper divisors (20881799).

1858472101 is an equidigital number, since it uses as much as digits as its factorization.

1858472101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20881798.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 1858472101 is about 43110.0000115982. Note that the first 4 decimals coincide. The cubic root of 1858472101 is about 1229.4721115890.

The spelling of 1858472101 in words is "one billion, eight hundred fifty-eight million, four hundred seventy-two thousand, one hundred one".