1029721097 has 2 divisors, whose sum is σ = 1029721098. Its totient is φ = 1029721096.

The previous prime is 1029721061. The next prime is 1029721103. The reversal of 1029721097 is 7901279201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012448761 + 17272336 = 31819^2 + 4156^2 .

It is an emirp because it is prime and its reverse (7901279201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1029721097 - 2¹⁴ = 1029704713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1029721097.

It is not a weakly prime, because it can be changed into another prime (1029721597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514860548 + 514860549.

It is an arithmetic number, because the mean of its divisors is an integer number (514860549).

Almost surely, 2^1029721097 is an apocalyptic number.

It is an amenable number.

1029721097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1029721097 is an equidigital number, since it uses as much as digits as its factorization.

1029721097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 1029721097 is about 32089.2676295362. The cubic root of 1029721097 is about 1009.8104722305.

The spelling of 1029721097 in words is "one billion, twenty-nine million, seven hundred twenty-one thousand, ninety-seven".