60990221 has 2 divisors, whose sum is σ = 60990222. Its totient is φ = 60990220.

The previous prime is 60990197. The next prime is 60990229. The reversal of 60990221 is 12209906.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35880100 + 25110121 = 5990^2 + 5011^2 .

It is a cyclic number.

It is not a de Polignac number, because 60990221 - 2⁶ = 60990157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60990229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30495110 + 30495111.

It is an arithmetic number, because the mean of its divisors is an integer number (30495111).

Almost surely, 2^60990221 is an apocalyptic number.

It is an amenable number.

60990221 is a deficient number, since it is larger than the sum of its proper divisors (1).

60990221 is an equidigital number, since it uses as much as digits as its factorization.

60990221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 60990221 is about 7809.6236144900. The cubic root of 60990221 is about 393.6286816637.

The spelling of 60990221 in words is "sixty million, nine hundred ninety thousand, two hundred twenty-one".