98127721 has 4 divisors (see below), whose sum is σ = 98391172. Its totient is φ = 97864272.

The previous prime is 98127713. The next prime is 98127767. The reversal of 98127721 is 12772189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12772189 = 947 ⋅13487.

It can be written as a sum of positive squares in 2 ways, for example, as 18275625 + 79852096 = 4275^2 + 8936^2 .

It is a cyclic number.

It is not a de Polignac number, because 98127721 - 2³ = 98127713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98127781) 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, 131166 + ... + 131911.

It is an arithmetic number, because the mean of its divisors is an integer number (24597793).

Almost surely, 2^98127721 is an apocalyptic number.

It is an amenable number.

98127721 is a deficient number, since it is larger than the sum of its proper divisors (263451).

98127721 is a wasteful number, since it uses less digits than its factorization.

98127721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263450.

The product of its digits is 14112, while the sum is 37.

The square root of 98127721 is about 9905.9437208173. The cubic root of 98127721 is about 461.2438312153.

The spelling of 98127721 in words is "ninety-eight million, one hundred twenty-seven thousand, seven hundred twenty-one".