70198913 has 2 divisors, whose sum is σ = 70198914. Its totient is φ = 70198912.

The previous prime is 70198897. The next prime is 70198957. The reversal of 70198913 is 31989107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41383489 + 28815424 = 6433^2 + 5368^2 .

It is a cyclic number.

It is not a de Polignac number, because 70198913 - 2⁴ = 70198897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70198813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35099456 + 35099457.

It is an arithmetic number, because the mean of its divisors is an integer number (35099457).

Almost surely, 2^70198913 is an apocalyptic number.

It is an amenable number.

70198913 is a deficient number, since it is larger than the sum of its proper divisors (1).

70198913 is an equidigital number, since it uses as much as digits as its factorization.

70198913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 70198913 is about 8378.4791579379. The cubic root of 70198913 is about 412.5185309092.

The spelling of 70198913 in words is "seventy million, one hundred ninety-eight thousand, nine hundred thirteen".