1097729447 has 2 divisors, whose sum is σ = 1097729448. Its totient is φ = 1097729446.

The previous prime is 1097729443. The next prime is 1097729459. The reversal of 1097729447 is 7449277901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1097729447 - 2² = 1097729443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1097729395 and 1097729404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1097729443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548864723 + 548864724.

It is an arithmetic number, because the mean of its divisors is an integer number (548864724).

Almost surely, 2^1097729447 is an apocalyptic number.

1097729447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097729447 is an equidigital number, since it uses as much as digits as its factorization.

1097729447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 1097729447 is about 33132.0003470965. Note that the first 3 decimals coincide. The cubic root of 1097729447 is about 1031.5693696260.

The spelling of 1097729447 in words is "one billion, ninety-seven million, seven hundred twenty-nine thousand, four hundred forty-seven".