58145991 has 4 divisors (see below), whose sum is σ = 77527992. Its totient is φ = 38763992.

The previous prime is 58145963. The next prime is 58145999. The reversal of 58145991 is 19954185.

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

It is a cyclic number.

It is not a de Polignac number, because 58145991 - 2¹⁰ = 58144967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58145999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9690996 + ... + 9691001.

It is an arithmetic number, because the mean of its divisors is an integer number (19381998).

Almost surely, 2^58145991 is an apocalyptic number.

58145991 is a deficient number, since it is larger than the sum of its proper divisors (19382001).

58145991 is a wasteful number, since it uses less digits than its factorization.

58145991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19382000.

The product of its digits is 64800, while the sum is 42.

The square root of 58145991 is about 7625.3518607340. The cubic root of 58145991 is about 387.4121696188.

The spelling of 58145991 in words is "fifty-eight million, one hundred forty-five thousand, nine hundred ninety-one".