1013721029 has 2 divisors, whose sum is σ = 1013721030. Its totient is φ = 1013721028.

The previous prime is 1013721019. The next prime is 1013721073. The reversal of 1013721029 is 9201273101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011112804 + 2608225 = 31798^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013721029 - 2¹² = 1013716933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1013720989 and 1013721007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013721019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506860514 + 506860515.

It is an arithmetic number, because the mean of its divisors is an integer number (506860515).

Almost surely, 2^1013721029 is an apocalyptic number.

It is an amenable number.

1013721029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013721029 is an equidigital number, since it uses as much as digits as its factorization.

1013721029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1013721029 is about 31838.9859920193. The cubic root of 1013721029 is about 1004.5529158316.

The spelling of 1013721029 in words is "one billion, thirteen million, seven hundred twenty-one thousand, twenty-nine".