4028891137 has 2 divisors, whose sum is σ = 4028891138. Its totient is φ = 4028891136.

The previous prime is 4028891129. The next prime is 4028891143. The reversal of 4028891137 is 7311988204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3051015696 + 977875441 = 55236^2 + 31271^2 .

It is a cyclic number.

It is not a de Polignac number, because 4028891137 - 2³ = 4028891129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4028891093 and 4028891102.

It is not a weakly prime, because it can be changed into another prime (4028891107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2014445568 + 2014445569.

It is an arithmetic number, because the mean of its divisors is an integer number (2014445569).

It is a Proth number, since it is equal to 15369 ⋅ 2¹⁸ + 1 and 15369 < 2¹⁸.

Almost surely, 2^4028891137 is an apocalyptic number.

It is an amenable number.

4028891137 is a deficient number, since it is larger than the sum of its proper divisors (1).

4028891137 is an equidigital number, since it uses as much as digits as its factorization.

4028891137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 4028891137 is about 63473.5467498075. The cubic root of 4028891137 is about 1591.2137057622.

The spelling of 4028891137 in words is "four billion, twenty-eight million, eight hundred ninety-one thousand, one hundred thirty-seven".