98278561 has 2 divisors, whose sum is σ = 98278562. Its totient is φ = 98278560.

The previous prime is 98278519. The next prime is 98278567. The reversal of 98278561 is 16587289.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52635025 + 45643536 = 7255^2 + 6756^2 .

It is an emirp because it is prime and its reverse (16587289) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98278561 - 2¹¹ = 98276513 is a prime.

It is not a weakly prime, because it can be changed into another prime (98278567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49139280 + 49139281.

It is an arithmetic number, because the mean of its divisors is an integer number (49139281).

Almost surely, 2^98278561 is an apocalyptic number.

It is an amenable number.

98278561 is a deficient number, since it is larger than the sum of its proper divisors (1).

98278561 is an equidigital number, since it uses as much as digits as its factorization.

98278561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 98278561 is about 9913.5544079810. The cubic root of 98278561 is about 461.4800485313.

The spelling of 98278561 in words is "ninety-eight million, two hundred seventy-eight thousand, five hundred sixty-one".