4190009021 has 4 divisors (see below), whose sum is σ = 4570918944. Its totient is φ = 3809099100.

The previous prime is 4190008973. The next prime is 4190009039. The reversal of 4190009021 is 1209000914.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4190009021 is a prime.

It is a super-2 number, since 2×4190009021² = 35112351192122756882, 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 (4190009081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190454945 + ... + 190454966.

It is an arithmetic number, because the mean of its divisors is an integer number (1142729736).

Almost surely, 2^4190009021 is an apocalyptic number.

It is an amenable number.

4190009021 is a deficient number, since it is larger than the sum of its proper divisors (380909923).

4190009021 is a wasteful number, since it uses less digits than its factorization.

4190009021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380909922.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 4190009021 is about 64730.2790122212. The cubic root of 4190009021 is about 1612.1482864582.

Adding to 4190009021 its reverse (1209000914), we get a palindrome (5399009935).

The spelling of 4190009021 in words is "four billion, one hundred ninety million, nine thousand, twenty-one".