58991381 has 2 divisors, whose sum is σ = 58991382. Its totient is φ = 58991380.

The previous prime is 58991369. The next prime is 58991407. The reversal of 58991381 is 18319985.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32376100 + 26615281 = 5690^2 + 5159^2 .

It is a cyclic number.

It is not a de Polignac number, because 58991381 - 2²² = 54797077 is a prime.

It is a super-2 number, since 2×58991381² = 6959966064574322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58991351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29495690 + 29495691.

It is an arithmetic number, because the mean of its divisors is an integer number (29495691).

Almost surely, 2^58991381 is an apocalyptic number.

It is an amenable number.

58991381 is a deficient number, since it is larger than the sum of its proper divisors (1).

58991381 is an equidigital number, since it uses as much as digits as its factorization.

58991381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 44.

The square root of 58991381 is about 7680.5846782651. The cubic root of 58991381 is about 389.2806837511.

The spelling of 58991381 in words is "fifty-eight million, nine hundred ninety-one thousand, three hundred eighty-one".