99670993 has 2 divisors, whose sum is σ = 99670994. Its totient is φ = 99670992.

The previous prime is 99670969. The next prime is 99671003. The reversal of 99670993 is 39907699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98247744 + 1423249 = 9912^2 + 1193^2 .

It is a cyclic number.

It is not a de Polignac number, because 99670993 - 2⁹ = 99670481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99670993.

It is not a weakly prime, because it can be changed into another prime (99670943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49835496 + 49835497.

It is an arithmetic number, because the mean of its divisors is an integer number (49835497).

Almost surely, 2^99670993 is an apocalyptic number.

It is an amenable number.

99670993 is a deficient number, since it is larger than the sum of its proper divisors (1).

99670993 is an equidigital number, since it uses as much as digits as its factorization.

99670993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 826686, while the sum is 52.

The square root of 99670993 is about 9983.5360969949. The cubic root of 99670993 is about 463.6492856755.

The spelling of 99670993 in words is "ninety-nine million, six hundred seventy thousand, nine hundred ninety-three".