60021691 has 2 divisors, whose sum is σ = 60021692. Its totient is φ = 60021690.

The previous prime is 60021683. The next prime is 60021707. The reversal of 60021691 is 19612006.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 60021691 - 2³ = 60021683 is a prime.

It is not a weakly prime, because it can be changed into another prime (60021601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30010845 + 30010846.

It is an arithmetic number, because the mean of its divisors is an integer number (30010846).

Almost surely, 2^60021691 is an apocalyptic number.

60021691 is a deficient number, since it is larger than the sum of its proper divisors (1).

60021691 is an equidigital number, since it uses as much as digits as its factorization.

60021691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 60021691 is about 7747.3667139229. The cubic root of 60021691 is about 391.5339347630.

Adding to 60021691 its reverse (19612006), we get a palindrome (79633697).

The spelling of 60021691 in words is "sixty million, twenty-one thousand, six hundred ninety-one".