98697421 has 2 divisors, whose sum is σ = 98697422. Its totient is φ = 98697420.

The previous prime is 98697407. The next prime is 98697449. The reversal of 98697421 is 12479689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56836521 + 41860900 = 7539^2 + 6470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98697421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98697481) 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, 49348710 + 49348711.

It is an arithmetic number, because the mean of its divisors is an integer number (49348711).

Almost surely, 2^98697421 is an apocalyptic number.

It is an amenable number.

98697421 is a deficient number, since it is larger than the sum of its proper divisors (1).

98697421 is an equidigital number, since it uses as much as digits as its factorization.

98697421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 98697421 is about 9934.6575683312. The cubic root of 98697421 is about 462.1347236137.

The spelling of 98697421 in words is "ninety-eight million, six hundred ninety-seven thousand, four hundred twenty-one".