58278721 has 2 divisors, whose sum is σ = 58278722. Its totient is φ = 58278720.

The previous prime is 58278679. The next prime is 58278749. The reversal of 58278721 is 12787285.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 746496 = 7585^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 58278721 - 2¹³ = 58270529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (58278751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29139360 + 29139361.

It is an arithmetic number, because the mean of its divisors is an integer number (29139361).

Almost surely, 2^58278721 is an apocalyptic number.

It is an amenable number.

58278721 is a deficient number, since it is larger than the sum of its proper divisors (1).

58278721 is an equidigital number, since it uses as much as digits as its factorization.

58278721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 40.

The square root of 58278721 is about 7634.0501046299. The cubic root of 58278721 is about 387.7067278476.

The spelling of 58278721 in words is "fifty-eight million, two hundred seventy-eight thousand, seven hundred twenty-one".