1106607721 has 2 divisors, whose sum is σ = 1106607722. Its totient is φ = 1106607720.

The previous prime is 1106607703. The next prime is 1106607727. The reversal of 1106607721 is 1277066011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1106294121 + 313600 = 33261^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1106607721 - 2¹⁷ = 1106476649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1106607727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553303860 + 553303861.

It is an arithmetic number, because the mean of its divisors is an integer number (553303861).

Almost surely, 2^1106607721 is an apocalyptic number.

It is an amenable number.

1106607721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1106607721 is an equidigital number, since it uses as much as digits as its factorization.

1106607721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 1106607721 is about 33265.7138958418. The cubic root of 1106607721 is about 1034.3429658800.

The spelling of 1106607721 in words is "one billion, one hundred six million, six hundred seven thousand, seven hundred twenty-one".