4492981421 has 2 divisors, whose sum is σ = 4492981422. Its totient is φ = 4492981420.

The previous prime is 4492981387. The next prime is 4492981453. The reversal of 4492981421 is 1241892944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3620428900 + 872552521 = 60170^2 + 29539^2 .

It is a cyclic number.

It is not a de Polignac number, because 4492981421 - 2²⁶ = 4425872557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4492983421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2246490710 + 2246490711.

It is an arithmetic number, because the mean of its divisors is an integer number (2246490711).

Almost surely, 2^4492981421 is an apocalyptic number.

It is an amenable number.

4492981421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4492981421 is an equidigital number, since it uses as much as digits as its factorization.

4492981421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 4492981421 is about 67029.7055118102. The cubic root of 4492981421 is about 1650.1048505149.

The spelling of 4492981421 in words is "four billion, four hundred ninety-two million, nine hundred eighty-one thousand, four hundred twenty-one".