32047721 has 2 divisors, whose sum is σ = 32047722. Its totient is φ = 32047720.

The previous prime is 32047681. The next prime is 32047727. The reversal of 32047721 is 12774023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 10471696 = 4645^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 32047721 - 2¹⁰ = 32046697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (32047727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16023860 + 16023861.

It is an arithmetic number, because the mean of its divisors is an integer number (16023861).

Almost surely, 2^32047721 is an apocalyptic number.

It is an amenable number.

32047721 is a deficient number, since it is larger than the sum of its proper divisors (1).

32047721 is an equidigital number, since it uses as much as digits as its factorization.

32047721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 32047721 is about 5661.0706584532. The cubic root of 32047721 is about 317.6379494368.

It can be divided in two parts, 32047 and 721, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 32047721 in words is "thirty-two million, forty-seven thousand, seven hundred twenty-one".