70198549 has 2 divisors, whose sum is σ = 70198550. Its totient is φ = 70198548.

The previous prime is 70198547. The next prime is 70198561. The reversal of 70198549 is 94589107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69605649 + 592900 = 8343^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 70198549 - 2¹ = 70198547 is a prime.

Together with 70198547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70198543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35099274 + 35099275.

It is an arithmetic number, because the mean of its divisors is an integer number (35099275).

Almost surely, 2^70198549 is an apocalyptic number.

It is an amenable number.

70198549 is a deficient number, since it is larger than the sum of its proper divisors (1).

70198549 is an equidigital number, since it uses as much as digits as its factorization.

70198549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 70198549 is about 8378.4574355904. The cubic root of 70198549 is about 412.5178179019.

The spelling of 70198549 in words is "seventy million, one hundred ninety-eight thousand, five hundred forty-nine".