58398721 has 4 divisors (see below), whose sum is σ = 60412500. Its totient is φ = 56384944.

The previous prime is 58398713. The next prime is 58398733. The reversal of 58398721 is 12789385.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48720400 + 9678321 = 6980^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 58398721 - 2³ = 58398713 is a prime.

It is a super-2 number, since 2×58398721² = 6820821228871682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (58398751) 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 in 3 ways as a sum of consecutive naturals, for example, 1006846 + ... + 1006903.

It is an arithmetic number, because the mean of its divisors is an integer number (15103125).

Almost surely, 2^58398721 is an apocalyptic number.

It is an amenable number.

58398721 is a deficient number, since it is larger than the sum of its proper divisors (2013779).

58398721 is a wasteful number, since it uses less digits than its factorization.

58398721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013778.

The product of its digits is 120960, while the sum is 43.

The square root of 58398721 is about 7641.9055869593. The cubic root of 58398721 is about 387.9726505858.

The spelling of 58398721 in words is "fifty-eight million, three hundred ninety-eight thousand, seven hundred twenty-one".