4892047921 has 2 divisors, whose sum is σ = 4892047922. Its totient is φ = 4892047920.

The previous prime is 4892047883. The next prime is 4892047943. The reversal of 4892047921 is 1297402984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3535967296 + 1356080625 = 59464^2 + 36825^2 .

It is a cyclic number.

It is not a de Polignac number, because 4892047921 - 2⁹ = 4892047409 is a prime.

It is a super-2 number, since 2×4892047921² = 47864265722720844482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4892047991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2446023960 + 2446023961.

It is an arithmetic number, because the mean of its divisors is an integer number (2446023961).

Almost surely, 2^4892047921 is an apocalyptic number.

It is an amenable number.

4892047921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4892047921 is an equidigital number, since it uses as much as digits as its factorization.

4892047921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 4892047921 is about 69943.1763719664. The cubic root of 4892047921 is about 1697.5799384098.

The spelling of 4892047921 in words is "four billion, eight hundred ninety-two million, forty-seven thousand, nine hundred twenty-one".