58390991 has 4 divisors (see below), whose sum is σ = 58554000. Its totient is φ = 58227984.

The previous prime is 58390987. The next prime is 58390999. The reversal of 58390991 is 19909385.

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 58390991 - 2² = 58390987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58390999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80966 + ... + 81683.

It is an arithmetic number, because the mean of its divisors is an integer number (14638500).

Almost surely, 2^58390991 is an apocalyptic number.

58390991 is the 4085-th centered heptagonal number.

58390991 is a deficient number, since it is larger than the sum of its proper divisors (163009).

58390991 is a wasteful number, since it uses less digits than its factorization.

58390991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163008.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 58390991 is about 7641.3998063182. The cubic root of 58390991 is about 387.9555317125.

The spelling of 58390991 in words is "fifty-eight million, three hundred ninety thousand, nine hundred ninety-one".