58236721 has 2 divisors, whose sum is σ = 58236722. Its totient is φ = 58236720.

The previous prime is 58236683. The next prime is 58236733. The reversal of 58236721 is 12763285.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47114496 + 11122225 = 6864^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 58236721 - 2⁷ = 58236593 is a prime.

It is equal to p_3463585 and since 58236721 and 3463585 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (58236791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29118360 + 29118361.

It is an arithmetic number, because the mean of its divisors is an integer number (29118361).

Almost surely, 2^58236721 is an apocalyptic number.

It is an amenable number.

58236721 is a deficient number, since it is larger than the sum of its proper divisors (1).

58236721 is an equidigital number, since it uses as much as digits as its factorization.

58236721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 58236721 is about 7631.2987754379. The cubic root of 58236721 is about 387.6135686544.

It can be divided in two parts, 5823 and 6721, that added together give a square (12544 = 112²).

The spelling of 58236721 in words is "fifty-eight million, two hundred thirty-six thousand, seven hundred twenty-one".