58981781 has 2 divisors, whose sum is σ = 58981782. Its totient is φ = 58981780.

The previous prime is 58981777. The next prime is 58981787. The reversal of 58981781 is 18718985.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58828900 + 152881 = 7670^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 58981781 - 2² = 58981777 is a prime.

It is a super-2 number, since 2×58981781² = 6957700979863922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58981787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29490890 + 29490891.

It is an arithmetic number, because the mean of its divisors is an integer number (29490891).

Almost surely, 2^58981781 is an apocalyptic number.

It is an amenable number.

58981781 is a deficient number, since it is larger than the sum of its proper divisors (1).

58981781 is an equidigital number, since it uses as much as digits as its factorization.

58981781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 47.

The square root of 58981781 is about 7679.9597004151. The cubic root of 58981781 is about 389.2595659921.

The spelling of 58981781 in words is "fifty-eight million, nine hundred eighty-one thousand, seven hundred eighty-one".