98991747 has 16 divisors (see below), whose sum is σ = 153031680. Its totient is φ = 63124776.

The previous prime is 98991743. The next prime is 98991751. The reversal of 98991747 is 74719989.

It is an interprime number because it is at equal distance from previous prime (98991743) and next prime (98991751).

It is not a de Polignac number, because 98991747 - 2² = 98991743 is a prime.

It is a super-2 number, since 2×98991747² = 19598731948224018, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 98991693 and 98991702.

It is not an unprimeable number, because it can be changed into a prime (98991743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79083 + ... + 80324.

It is an arithmetic number, because the mean of its divisors is an integer number (9564480).

Almost surely, 2^98991747 is an apocalyptic number.

98991747 is a deficient number, since it is larger than the sum of its proper divisors (54039933).

98991747 is a wasteful number, since it uses less digits than its factorization.

98991747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159439 (or 159433 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 98991747 is about 9949.4596335680. The cubic root of 98991747 is about 462.5936457077.

The spelling of 98991747 in words is "ninety-eight million, nine hundred ninety-one thousand, seven hundred forty-seven".