98620421 has 2 divisors, whose sum is σ = 98620422. Its totient is φ = 98620420.

The previous prime is 98620399. The next prime is 98620427. The reversal of 98620421 is 12402689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97792321 + 828100 = 9889^2 + 910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98620421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98620427) 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, 49310210 + 49310211.

It is an arithmetic number, because the mean of its divisors is an integer number (49310211).

Almost surely, 2^98620421 is an apocalyptic number.

It is an amenable number.

98620421 is a deficient number, since it is larger than the sum of its proper divisors (1).

98620421 is an equidigital number, since it uses as much as digits as its factorization.

98620421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 98620421 is about 9930.7814898929. The cubic root of 98620421 is about 462.0145123281.

The spelling of 98620421 in words is "ninety-eight million, six hundred twenty thousand, four hundred twenty-one".