98991143 has 2 divisors, whose sum is σ = 98991144. Its totient is φ = 98991142.

The previous prime is 98991107. The next prime is 98991173. The reversal of 98991143 is 34119989.

It is a strong prime.

It is an emirp because it is prime and its reverse (34119989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98991143 - 2¹² = 98987047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 98991094 and 98991103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98991173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49495571 + 49495572.

It is an arithmetic number, because the mean of its divisors is an integer number (49495572).

Almost surely, 2^98991143 is an apocalyptic number.

98991143 is a deficient number, since it is larger than the sum of its proper divisors (1).

98991143 is an equidigital number, since it uses as much as digits as its factorization.

98991143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The square root of 98991143 is about 9949.4292801145. The cubic root of 98991143 is about 462.5927048645.

The spelling of 98991143 in words is "ninety-eight million, nine hundred ninety-one thousand, one hundred forty-three".