63027721 has 9 divisors (see below), whose sum is σ = 67096999. Its totient is φ = 59193184.

The previous prime is 63027719. The next prime is 63027733. The reversal of 63027721 is 12772036.

The square root of 63027721 is 7939.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 49070025 + 13957696 = 7005^2 + 3736^2 .

It is not a de Polignac number, because 63027721 - 2¹ = 63027719 is a prime.

It is a super-2 number, since 2×63027721² = 7944987228907682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63027721.

It is not an unprimeable number, because it can be changed into a prime (63027781) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 134730 + ... + 135196.

Almost surely, 2^63027721 is an apocalyptic number.

63027721 is the 7939-th square number.

63027721 is the 3970-th centered octagonal number.

It is an amenable number.

63027721 is a deficient number, since it is larger than the sum of its proper divisors (4069278).

63027721 is an frugal number, since it uses more digits than its factorization.

63027721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The cubic root of 63027721 is about 397.9640738428.

Adding to 63027721 its reverse (12772036), we get a palindrome (75799757).

The spelling of 63027721 in words is "sixty-three million, twenty-seven thousand, seven hundred twenty-one".