58821391 has 2 divisors, whose sum is σ = 58821392. Its totient is φ = 58821390.

The previous prime is 58821349. The next prime is 58821401. The reversal of 58821391 is 19312885.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 58821391 - 2¹⁵ = 58788623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 58821391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58821311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29410695 + 29410696.

It is an arithmetic number, because the mean of its divisors is an integer number (29410696).

Almost surely, 2^58821391 is an apocalyptic number.

58821391 is a deficient number, since it is larger than the sum of its proper divisors (1).

58821391 is an equidigital number, since it uses as much as digits as its factorization.

58821391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 58821391 is about 7669.5104798155. The cubic root of 58821391 is about 388.9064059804.

The spelling of 58821391 in words is "fifty-eight million, eight hundred twenty-one thousand, three hundred ninety-one".