98278181 has 2 divisors, whose sum is σ = 98278182. Its totient is φ = 98278180.

The previous prime is 98278163. The next prime is 98278217. The reversal of 98278181 is 18187289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89605156 + 8673025 = 9466^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 98278181 - 2²⁶ = 31169317 is a prime.

It is a super-2 number, since 2×98278181² = 19317201721337522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98278781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49139090 + 49139091.

It is an arithmetic number, because the mean of its divisors is an integer number (49139091).

Almost surely, 2^98278181 is an apocalyptic number.

It is an amenable number.

98278181 is a deficient number, since it is larger than the sum of its proper divisors (1).

98278181 is an equidigital number, since it uses as much as digits as its factorization.

98278181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 44.

The square root of 98278181 is about 9913.5352422837. The cubic root of 98278181 is about 461.4794537503.

The spelling of 98278181 in words is "ninety-eight million, two hundred seventy-eight thousand, one hundred eighty-one".