1893700421 has 4 divisors (see below), whose sum is σ = 1894214700. Its totient is φ = 1893186144.

The previous prime is 1893700387. The next prime is 1893700433. The reversal of 1893700421 is 1240073981.

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 276856321 + 1616844100 = 16639^2 + 40210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1893700421 - 2¹⁰ = 1893699397 is a prime.

It is a super-2 number, since 2×1893700421² = 7172202568991154482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1893700481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251576 + ... + 258993.

It is an arithmetic number, because the mean of its divisors is an integer number (473553675).

Almost surely, 2^1893700421 is an apocalyptic number.

It is an amenable number.

1893700421 is a deficient number, since it is larger than the sum of its proper divisors (514279).

1893700421 is an equidigital number, since it uses as much as digits as its factorization.

1893700421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514278.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1893700421 is about 43516.6683122686. The cubic root of 1893700421 is about 1237.1919681717.

The spelling of 1893700421 in words is "one billion, eight hundred ninety-three million, seven hundred thousand, four hundred twenty-one".