58681981 has 4 divisors (see below), whose sum is σ = 58729212. Its totient is φ = 58634752.

The previous prime is 58681979. The next prime is 58682021. The reversal of 58681981 is 18918685.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18918685 = 5 ⋅3783737.

It can be written as a sum of positive squares in 2 ways, for example, as 27657081 + 31024900 = 5259^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 58681981 - 2¹ = 58681979 is a prime.

It is a super-2 number, since 2×58681981² = 6887149788168722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58681921) 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, 21700 + ... + 24253.

It is an arithmetic number, because the mean of its divisors is an integer number (14682303).

Almost surely, 2^58681981 is an apocalyptic number.

It is an amenable number.

58681981 is a deficient number, since it is larger than the sum of its proper divisors (47231).

58681981 is a wasteful number, since it uses less digits than its factorization.

58681981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47230.

The product of its digits is 138240, while the sum is 46.

The square root of 58681981 is about 7660.4165030369. The cubic root of 58681981 is about 388.5989195914.

The spelling of 58681981 in words is "fifty-eight million, six hundred eighty-one thousand, nine hundred eighty-one".