99670817 has 2 divisors, whose sum is σ = 99670818. Its totient is φ = 99670816.

The previous prime is 99670811. The next prime is 99670849. The reversal of 99670817 is 71807699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55368481 + 44302336 = 7441^2 + 6656^2 .

It is a cyclic number.

It is not a de Polignac number, because 99670817 - 2⁴ = 99670801 is a prime.

It is a super-2 number, since 2×99670817² = 19868543522894978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99670811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49835408 + 49835409.

It is an arithmetic number, because the mean of its divisors is an integer number (49835409).

Almost surely, 2^99670817 is an apocalyptic number.

It is an amenable number.

99670817 is a deficient number, since it is larger than the sum of its proper divisors (1).

99670817 is an equidigital number, since it uses as much as digits as its factorization.

99670817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 99670817 is about 9983.5272824789. The cubic root of 99670817 is about 463.6490127699.

The spelling of 99670817 in words is "ninety-nine million, six hundred seventy thousand, eight hundred seventeen".