58721009 has 8 divisors (see below), whose sum is σ = 62392680. Its totient is φ = 55073536.

The previous prime is 58720973. The next prime is 58721051. The reversal of 58721009 is 90012785.

It can be written as a sum of positive squares in 4 ways, for example, as 13897984 + 44823025 = 3728^2 + 6695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 58721009 - 2²⁴ = 41943793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (58721209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914 + ... + 10875.

It is an arithmetic number, because the mean of its divisors is an integer number (7799085).

Almost surely, 2^58721009 is an apocalyptic number.

It is an amenable number.

58721009 is a deficient number, since it is larger than the sum of its proper divisors (3671671).

58721009 is a wasteful number, since it uses less digits than its factorization.

58721009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12099.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 58721009 is about 7662.9634606985. The cubic root of 58721009 is about 388.6850498219.

The spelling of 58721009 in words is "fifty-eight million, seven hundred twenty-one thousand, nine".