98651989 has 4 divisors (see below), whose sum is σ = 98701740. Its totient is φ = 98602240.

The previous prime is 98651983. The next prime is 98652017. The reversal of 98651989 is 98915689.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98915689 = 37 ⋅2673397.

It can be written as a sum of positive squares in 2 ways, for example, as 17056900 + 81595089 = 4130^2 + 9033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98651989 is a prime.

It is a super-2 number, since 2×98651989² = 19464429867312242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98651983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21772 + ... + 25909.

It is an arithmetic number, because the mean of its divisors is an integer number (24675435).

Almost surely, 2^98651989 is an apocalyptic number.

It is an amenable number.

98651989 is a deficient number, since it is larger than the sum of its proper divisors (49751).

98651989 is a wasteful number, since it uses less digits than its factorization.

98651989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49750.

The product of its digits is 1399680, while the sum is 55.

The square root of 98651989 is about 9932.3707643241. The cubic root of 98651989 is about 462.0638033981.

It can be divided in two parts, 986 and 51989, that added together give a triangular number (52975 = T₃₂₅).

The spelling of 98651989 in words is "ninety-eight million, six hundred fifty-one thousand, nine hundred eighty-nine".