58081721 has 2 divisors, whose sum is σ = 58081722. Its totient is φ = 58081720.

The previous prime is 58081717. The next prime is 58081781. The reversal of 58081721 is 12718085.

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., 53290000 + 4791721 = 7300^2 + 2189^2 .

It is a cyclic number.

It is not a de Polignac number, because 58081721 - 2² = 58081717 is a prime.

It is not a weakly prime, because it can be changed into another prime (58081711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29040860 + 29040861.

It is an arithmetic number, because the mean of its divisors is an integer number (29040861).

Almost surely, 2^58081721 is an apocalyptic number.

It is an amenable number.

58081721 is a deficient number, since it is larger than the sum of its proper divisors (1).

58081721 is an equidigital number, since it uses as much as digits as its factorization.

58081721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 58081721 is about 7621.1364638091. The cubic root of 58081721 is about 387.2693786935.

The spelling of 58081721 in words is "fifty-eight million, eighty-one thousand, seven hundred twenty-one".