1020729247 has 2 divisors, whose sum is σ = 1020729248. Its totient is φ = 1020729246.

The previous prime is 1020729187. The next prime is 1020729319. The reversal of 1020729247 is 7429270201.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7429270201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020729247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020729547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510364623 + 510364624.

It is an arithmetic number, because the mean of its divisors is an integer number (510364624).

Almost surely, 2^1020729247 is an apocalyptic number.

1020729247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020729247 is an equidigital number, since it uses as much as digits as its factorization.

1020729247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 1020729247 is about 31948.8536101063. The cubic root of 1020729247 is about 1006.8625467230.

Adding to 1020729247 its reverse (7429270201), we get a palindrome (8449999448).

The spelling of 1020729247 in words is "one billion, twenty million, seven hundred twenty-nine thousand, two hundred forty-seven".