4192090921 has 2 divisors, whose sum is σ = 4192090922. Its totient is φ = 4192090920.

The previous prime is 4192090849. The next prime is 4192090937. The reversal of 4192090921 is 1290902914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3926400921 + 265690000 = 62661^2 + 16300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4192090921 is a prime.

It is not a weakly prime, because it can be changed into another prime (4192091921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2096045460 + 2096045461.

It is an arithmetic number, because the mean of its divisors is an integer number (2096045461).

Almost surely, 2^4192090921 is an apocalyptic number.

It is an amenable number.

4192090921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4192090921 is an equidigital number, since it uses as much as digits as its factorization.

4192090921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 4192090921 is about 64746.3583609148. The cubic root of 4192090921 is about 1612.4152529305.

The spelling of 4192090921 in words is "four billion, one hundred ninety-two million, ninety thousand, nine hundred twenty-one".