4277494021 has 2 divisors, whose sum is σ = 4277494022. Its totient is φ = 4277494020.

The previous prime is 4277494019. The next prime is 4277494037. The reversal of 4277494021 is 1204947724.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4051322500 + 226171521 = 63650^2 + 15039^2 .

It is a cyclic number.

It is not a de Polignac number, because 4277494021 - 2¹ = 4277494019 is a prime.

Together with 4277494019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4277494061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2138747010 + 2138747011.

It is an arithmetic number, because the mean of its divisors is an integer number (2138747011).

Almost surely, 2^4277494021 is an apocalyptic number.

It is an amenable number.

4277494021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4277494021 is an equidigital number, since it uses as much as digits as its factorization.

4277494021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 4277494021 is about 65402.5536275152. The cubic root of 4277494021 is about 1623.2913348478.

The spelling of 4277494021 in words is "four billion, two hundred seventy-seven million, four hundred ninety-four thousand, twenty-one".