1874357921 has 2 divisors, whose sum is σ = 1874357922. Its totient is φ = 1874357920.

The previous prime is 1874357909. The next prime is 1874357939. The reversal of 1874357921 is 1297534781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979690000 + 894667921 = 31300^2 + 29911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1874357921 - 2⁶ = 1874357857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1874357971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 937178960 + 937178961.

It is an arithmetic number, because the mean of its divisors is an integer number (937178961).

Almost surely, 2^1874357921 is an apocalyptic number.

It is an amenable number.

1874357921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1874357921 is an equidigital number, since it uses as much as digits as its factorization.

1874357921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 47.

The square root of 1874357921 is about 43293.8554647192. The cubic root of 1874357921 is about 1232.9652652746.

The spelling of 1874357921 in words is "one billion, eight hundred seventy-four million, three hundred fifty-seven thousand, nine hundred twenty-one".