60000991 has 2 divisors, whose sum is σ = 60000992. Its totient is φ = 60000990.

The previous prime is 60000989. The next prime is 60001021. The reversal of 60000991 is 19900006.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 60000991 - 2¹ = 60000989 is a prime.

Together with 60000989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60000091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30000495 + 30000496.

It is an arithmetic number, because the mean of its divisors is an integer number (30000496).

Almost surely, 2^60000991 is an apocalyptic number.

60000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

60000991 is an equidigital number, since it uses as much as digits as its factorization.

60000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 60000991 is about 7746.0306609256. The cubic root of 60000991 is about 391.4889194571.

Adding to 60000991 its reverse (19900006), we get a palindrome (79900997).

The spelling of 60000991 in words is "sixty million, nine hundred ninety-one", and thus it is an aban number.