1851124889 has 2 divisors, whose sum is σ = 1851124890. Its totient is φ = 1851124888.

The previous prime is 1851124871. The next prime is 1851124903. The reversal of 1851124889 is 9884211581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1757034889 + 94090000 = 41917^2 + 9700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851124889 - 2⁸ = 1851124633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1851124819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925562444 + 925562445.

It is an arithmetic number, because the mean of its divisors is an integer number (925562445).

Almost surely, 2^1851124889 is an apocalyptic number.

It is an amenable number.

1851124889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851124889 is an equidigital number, since it uses as much as digits as its factorization.

1851124889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 47.

The square root of 1851124889 is about 43024.7009170314. The cubic root of 1851124889 is about 1227.8497892728.

The spelling of 1851124889 in words is "one billion, eight hundred fifty-one million, one hundred twenty-four thousand, eight hundred eighty-nine".