1108713721 has 2 divisors, whose sum is σ = 1108713722. Its totient is φ = 1108713720.

The previous prime is 1108713709. The next prime is 1108713743. The reversal of 1108713721 is 1273178011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741799696 + 366914025 = 27236^2 + 19155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1108713721 - 2¹³ = 1108705529 is a prime.

It is a super-2 number, since 2×1108713721² = 2458492230267331682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1108713421) 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, 554356860 + 554356861.

It is an arithmetic number, because the mean of its divisors is an integer number (554356861).

Almost surely, 2^1108713721 is an apocalyptic number.

It is an amenable number.

1108713721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108713721 is an equidigital number, since it uses as much as digits as its factorization.

1108713721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 1108713721 is about 33297.3530629688. The cubic root of 1108713721 is about 1034.9987073972.

The spelling of 1108713721 in words is "one billion, one hundred eight million, seven hundred thirteen thousand, seven hundred twenty-one".