98475821 has 2 divisors, whose sum is σ = 98475822. Its totient is φ = 98475820.

The previous prime is 98475761. The next prime is 98475827. The reversal of 98475821 is 12857489.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96255721 + 2220100 = 9811^2 + 1490^2 .

It is an emirp because it is prime and its reverse (12857489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98475821 - 2⁶ = 98475757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98475827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49237910 + 49237911.

It is an arithmetic number, because the mean of its divisors is an integer number (49237911).

Almost surely, 2^98475821 is an apocalyptic number.

It is an amenable number.

98475821 is a deficient number, since it is larger than the sum of its proper divisors (1).

98475821 is an equidigital number, since it uses as much as digits as its factorization.

98475821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 98475821 is about 9923.4984254546. The cubic root of 98475821 is about 461.7885957076.

The spelling of 98475821 in words is "ninety-eight million, four hundred seventy-five thousand, eight hundred twenty-one".