990070517 has 2 divisors, whose sum is σ = 990070518. Its totient is φ = 990070516.

The previous prime is 990070483. The next prime is 990070519. The reversal of 990070517 is 715070099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 673194916 + 316875601 = 25946^2 + 17801^2 .

It is a cyclic number.

It is not a de Polignac number, because 990070517 - 2⁶ = 990070453 is a prime.

Together with 990070519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990070519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495035258 + 495035259.

It is an arithmetic number, because the mean of its divisors is an integer number (495035259).

Almost surely, 2^990070517 is an apocalyptic number.

It is an amenable number.

990070517 is a deficient number, since it is larger than the sum of its proper divisors (1).

990070517 is an equidigital number, since it uses as much as digits as its factorization.

990070517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845, while the sum is 38.

The square root of 990070517 is about 31465.3860138407. The cubic root of 990070517 is about 996.6791565395.

The spelling of 990070517 in words is "nine hundred ninety million, seventy thousand, five hundred seventeen".