997030709 has 2 divisors, whose sum is σ = 997030710. Its totient is φ = 997030708.

The previous prime is 997030673. The next prime is 997030721. The reversal of 997030709 is 907030799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570732100 + 426298609 = 23890^2 + 20647^2 .

It is a cyclic number.

It is not a de Polignac number, because 997030709 - 2²⁸ = 728595253 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997030709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997030799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498515354 + 498515355.

It is an arithmetic number, because the mean of its divisors is an integer number (498515355).

Almost surely, 2^997030709 is an apocalyptic number.

It is an amenable number.

997030709 is a deficient number, since it is larger than the sum of its proper divisors (1).

997030709 is an equidigital number, since it uses as much as digits as its factorization.

997030709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107163, while the sum is 44.

The square root of 997030709 is about 31575.7930858435. The cubic root of 997030709 is about 999.0092550820.

The spelling of 997030709 in words is "nine hundred ninety-seven million, thirty thousand, seven hundred nine".