1121690729 has 2 divisors, whose sum is σ = 1121690730. Its totient is φ = 1121690728.

The previous prime is 1121690641. The next prime is 1121690809. The reversal of 1121690729 is 9270961211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1117364329 + 4326400 = 33427^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121690729 - 2¹² = 1121686633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121690692 and 1121690701.

It is not a weakly prime, because it can be changed into another prime (1121600729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560845364 + 560845365.

It is an arithmetic number, because the mean of its divisors is an integer number (560845365).

Almost surely, 2^1121690729 is an apocalyptic number.

It is an amenable number.

1121690729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121690729 is an equidigital number, since it uses as much as digits as its factorization.

1121690729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 1121690729 is about 33491.6516314141. The cubic root of 1121690729 is about 1039.0211231368.

The spelling of 1121690729 in words is "one billion, one hundred twenty-one million, six hundred ninety thousand, seven hundred twenty-nine".