98781197 has 2 divisors, whose sum is σ = 98781198. Its totient is φ = 98781196.

The previous prime is 98781187. The next prime is 98781233. The reversal of 98781197 is 79118789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89226916 + 9554281 = 9446^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 98781197 - 2⁴ = 98781181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98781187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49390598 + 49390599.

It is an arithmetic number, because the mean of its divisors is an integer number (49390599).

Almost surely, 2^98781197 is an apocalyptic number.

It is an amenable number.

98781197 is a deficient number, since it is larger than the sum of its proper divisors (1).

98781197 is an equidigital number, since it uses as much as digits as its factorization.

98781197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 50.

The square root of 98781197 is about 9938.8730246442. The cubic root of 98781197 is about 462.2654424957.

The spelling of 98781197 in words is "ninety-eight million, seven hundred eighty-one thousand, one hundred ninety-seven".