1896192421 has 2 divisors, whose sum is σ = 1896192422. Its totient is φ = 1896192420.

The previous prime is 1896192413. The next prime is 1896192433. The reversal of 1896192421 is 1242916981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1431789921 + 464402500 = 37839^2 + 21550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1896192421 - 2³ = 1896192413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1896192401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948096210 + 948096211.

It is an arithmetic number, because the mean of its divisors is an integer number (948096211).

Almost surely, 2^1896192421 is an apocalyptic number.

It is an amenable number.

1896192421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1896192421 is an equidigital number, since it uses as much as digits as its factorization.

1896192421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 1896192421 is about 43545.2916054078. The cubic root of 1896192421 is about 1237.7344212708.

The spelling of 1896192421 in words is "one billion, eight hundred ninety-six million, one hundred ninety-two thousand, four hundred twenty-one".