1846249021 has 2 divisors, whose sum is σ = 1846249022. Its totient is φ = 1846249020.

The previous prime is 1846248991. The next prime is 1846249049. The reversal of 1846249021 is 1209426481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653316921 + 192932100 = 40661^2 + 13890^2 .

It is an emirp because it is prime and its reverse (1209426481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1846249021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1846249081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 923124510 + 923124511.

It is an arithmetic number, because the mean of its divisors is an integer number (923124511).

Almost surely, 2^1846249021 is an apocalyptic number.

It is an amenable number.

1846249021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1846249021 is an equidigital number, since it uses as much as digits as its factorization.

1846249021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1846249021 is about 42967.9999650903. Note that the first 4 decimals coincide. The cubic root of 1846249021 is about 1226.7707881237.

The spelling of 1846249021 in words is "one billion, eight hundred forty-six million, two hundred forty-nine thousand, twenty-one".