60391921 has 2 divisors, whose sum is σ = 60391922. Its totient is φ = 60391920.

The previous prime is 60391907. The next prime is 60391927. The reversal of 60391921 is 12919306.

60391921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60279696 + 112225 = 7764^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 60391921 - 2⁵ = 60391889 is a prime.

It is not a weakly prime, because it can be changed into another prime (60391927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30195960 + 30195961.

It is an arithmetic number, because the mean of its divisors is an integer number (30195961).

Almost surely, 2^60391921 is an apocalyptic number.

It is an amenable number.

60391921 is a deficient number, since it is larger than the sum of its proper divisors (1).

60391921 is an equidigital number, since it uses as much as digits as its factorization.

60391921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 60391921 is about 7771.2239061811. The cubic root of 60391921 is about 392.3373142165.

The spelling of 60391921 in words is "sixty million, three hundred ninety-one thousand, nine hundred twenty-one".