1081351729 has 2 divisors, whose sum is σ = 1081351730. Its totient is φ = 1081351728.

The previous prime is 1081351727. The next prime is 1081351757. The reversal of 1081351729 is 9271531801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1069290000 + 12061729 = 32700^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081351729 - 2¹ = 1081351727 is a prime.

It is a super-2 number, since 2×1081351729² = 2338643123622578882, which contains 22 as substring.

Together with 1081351727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1081351727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540675864 + 540675865.

It is an arithmetic number, because the mean of its divisors is an integer number (540675865).

Almost surely, 2^1081351729 is an apocalyptic number.

It is an amenable number.

1081351729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081351729 is an equidigital number, since it uses as much as digits as its factorization.

1081351729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 1081351729 is about 32883.9129210622. The cubic root of 1081351729 is about 1026.4134310467.

The spelling of 1081351729 in words is "one billion, eighty-one million, three hundred fifty-one thousand, seven hundred twenty-nine".