98278643 has 2 divisors, whose sum is σ = 98278644. Its totient is φ = 98278642.

The previous prime is 98278639. The next prime is 98278657. The reversal of 98278643 is 34687289.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98278643 - 2² = 98278639 is a prime.

It is not a weakly prime, because it can be changed into another prime (98278603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49139321 + 49139322.

It is an arithmetic number, because the mean of its divisors is an integer number (49139322).

Almost surely, 2^98278643 is an apocalyptic number.

98278643 is a deficient number, since it is larger than the sum of its proper divisors (1).

98278643 is an equidigital number, since it uses as much as digits as its factorization.

98278643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 98278643 is about 9913.5585437319. The cubic root of 98278643 is about 461.4801768785.

The spelling of 98278643 in words is "ninety-eight million, two hundred seventy-eight thousand, six hundred forty-three".