715797989 has 2 divisors, whose sum is σ = 715797990. Its totient is φ = 715797988.

The previous prime is 715797977. The next prime is 715798003. The reversal of 715797989 is 989797517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416853889 + 298944100 = 20417^2 + 17290^2 .

It is an emirp because it is prime and its reverse (989797517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 715797989 - 2²⁸ = 447362533 is a prime.

It is a super-2 number, since 2×715797989² = 1024733522112888242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (715790989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357898994 + 357898995.

It is an arithmetic number, because the mean of its divisors is an integer number (357898995).

Almost surely, 2^715797989 is an apocalyptic number.

It is an amenable number.

715797989 is a deficient number, since it is larger than the sum of its proper divisors (1).

715797989 is an equidigital number, since it uses as much as digits as its factorization.

715797989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 62.

The square root of 715797989 is about 26754.4013014681. The cubic root of 715797989 is about 894.5339433416.

The spelling of 715797989 in words is "seven hundred fifteen million, seven hundred ninety-seven thousand, nine hundred eighty-nine".