1858472089 has 2 divisors, whose sum is σ = 1858472090. Its totient is φ = 1858472088.

The previous prime is 1858472069. The next prime is 1858472123. The reversal of 1858472089 is 9802748581.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1453134400 + 405337689 = 38120^2 + 20133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1858472089 - 2⁹ = 1858471577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1858472009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929236044 + 929236045.

It is an arithmetic number, because the mean of its divisors is an integer number (929236045).

Almost surely, 2^1858472089 is an apocalyptic number.

It is an amenable number.

1858472089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1858472089 is an equidigital number, since it uses as much as digits as its factorization.

1858472089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The square root of 1858472089 is about 43109.9998724194. Note that the first 3 decimals coincide. The cubic root of 1858472089 is about 1229.4721089428.

The spelling of 1858472089 in words is "one billion, eight hundred fifty-eight million, four hundred seventy-two thousand, eighty-nine".