98919421 has 2 divisors, whose sum is σ = 98919422. Its totient is φ = 98919420.

The previous prime is 98919407. The next prime is 98919427. The reversal of 98919421 is 12491989.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98287396 + 632025 = 9914^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 98919421 - 2⁹ = 98918909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98919427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49459710 + 49459711.

It is an arithmetic number, because the mean of its divisors is an integer number (49459711).

Almost surely, 2^98919421 is an apocalyptic number.

It is an amenable number.

98919421 is a deficient number, since it is larger than the sum of its proper divisors (1).

98919421 is an equidigital number, since it uses as much as digits as its factorization.

98919421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 43.

The square root of 98919421 is about 9945.8242996747. The cubic root of 98919421 is about 462.4809571901.

The spelling of 98919421 in words is "ninety-eight million, nine hundred nineteen thousand, four hundred twenty-one".