99670397 has 2 divisors, whose sum is σ = 99670398. Its totient is φ = 99670396.

The previous prime is 99670387. The next prime is 99670451. The reversal of 99670397 is 79307699.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 46977316 = 7259^2 + 6854^2 .

It is a cyclic number.

It is not a de Polignac number, because 99670397 - 2⁸ = 99670141 is a prime.

It is a super-3 number, since 3×99670397³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99670387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49835198 + 49835199.

It is an arithmetic number, because the mean of its divisors is an integer number (49835199).

Almost surely, 2^99670397 is an apocalyptic number.

It is an amenable number.

99670397 is a deficient number, since it is larger than the sum of its proper divisors (1).

99670397 is an equidigital number, since it uses as much as digits as its factorization.

99670397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 99670397 is about 9983.5062478069. The cubic root of 99670397 is about 463.6483615166.

The spelling of 99670397 in words is "ninety-nine million, six hundred seventy thousand, three hundred ninety-seven".