98979109 has 2 divisors, whose sum is σ = 98979110. Its totient is φ = 98979108.

The previous prime is 98979071. The next prime is 98979121. The reversal of 98979109 is 90197989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97574884 + 1404225 = 9878^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 98979109 - 2¹³ = 98970917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98979809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49489554 + 49489555.

It is an arithmetic number, because the mean of its divisors is an integer number (49489555).

Almost surely, 2^98979109 is an apocalyptic number.

It is an amenable number.

98979109 is a deficient number, since it is larger than the sum of its proper divisors (1).

98979109 is an equidigital number, since it uses as much as digits as its factorization.

98979109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 98979109 is about 9948.8245034275. The cubic root of 98979109 is about 462.5739588567.

The spelling of 98979109 in words is "ninety-eight million, nine hundred seventy-nine thousand, one hundred nine".