98575721 has 2 divisors, whose sum is σ = 98575722. Its totient is φ = 98575720.

The previous prime is 98575699. The next prime is 98575751. The reversal of 98575721 is 12757589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83521321 + 15054400 = 9139^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 98575721 - 2⁶ = 98575657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98575751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49287860 + 49287861.

It is an arithmetic number, because the mean of its divisors is an integer number (49287861).

Almost surely, 2^98575721 is an apocalyptic number.

It is an amenable number.

98575721 is a deficient number, since it is larger than the sum of its proper divisors (1).

98575721 is an equidigital number, since it uses as much as digits as its factorization.

98575721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 44.

The square root of 98575721 is about 9928.5306566480. The cubic root of 98575721 is about 461.9446986273.

The spelling of 98575721 in words is "ninety-eight million, five hundred seventy-five thousand, seven hundred twenty-one".