98909731 has 4 divisors (see below), whose sum is σ = 100531264. Its totient is φ = 97288200.

The previous prime is 98909719. The next prime is 98909737. The reversal of 98909731 is 13790989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13790989 = 223 ⋅61843.

It is a cyclic number.

It is not a de Polignac number, because 98909731 - 2¹⁵ = 98876963 is a prime.

It is a super-2 number, since 2×98909731² = 19566269772984722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98909737) 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, 810675 + ... + 810796.

It is an arithmetic number, because the mean of its divisors is an integer number (25132816).

Almost surely, 2^98909731 is an apocalyptic number.

98909731 is a deficient number, since it is larger than the sum of its proper divisors (1621533).

98909731 is a wasteful number, since it uses less digits than its factorization.

98909731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621532.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 98909731 is about 9945.3371486340. The cubic root of 98909731 is about 462.4658553804.

The spelling of 98909731 in words is "ninety-eight million, nine hundred nine thousand, seven hundred thirty-one".