4490653721 has 2 divisors, whose sum is σ = 4490653722. Its totient is φ = 4490653720.

The previous prime is 4490653693. The next prime is 4490653753. The reversal of 4490653721 is 1273560944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2460160000 + 2030493721 = 49600^2 + 45061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4490653721 is a prime.

It is a super-2 number, since 2×4490653721² = 40331941683862291682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4490653771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2245326860 + 2245326861.

It is an arithmetic number, because the mean of its divisors is an integer number (2245326861).

Almost surely, 2^4490653721 is an apocalyptic number.

It is an amenable number.

4490653721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4490653721 is an equidigital number, since it uses as much as digits as its factorization.

4490653721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 4490653721 is about 67012.3400650955. The cubic root of 4490653721 is about 1649.8198420991.

The spelling of 4490653721 in words is "four billion, four hundred ninety million, six hundred fifty-three thousand, seven hundred twenty-one".