98125561 has 2 divisors, whose sum is σ = 98125562. Its totient is φ = 98125560.

The previous prime is 98125549. The next prime is 98125579. The reversal of 98125561 is 16552189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63680400 + 34445161 = 7980^2 + 5869^2 .

It is an emirp because it is prime and its reverse (16552189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98125561 - 2¹⁵ = 98092793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 98125561.

It is not a weakly prime, because it can be changed into another prime (98125501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49062780 + 49062781.

It is an arithmetic number, because the mean of its divisors is an integer number (49062781).

Almost surely, 2^98125561 is an apocalyptic number.

It is an amenable number.

98125561 is a deficient number, since it is larger than the sum of its proper divisors (1).

98125561 is an equidigital number, since it uses as much as digits as its factorization.

98125561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 37.

The square root of 98125561 is about 9905.8346947645. The cubic root of 98125561 is about 461.2404468709.

The spelling of 98125561 in words is "ninety-eight million, one hundred twenty-five thousand, five hundred sixty-one".