98775421 has 4 divisors (see below), whose sum is σ = 102181500. Its totient is φ = 95369344.

The previous prime is 98775419. The next prime is 98775431. The reversal of 98775421 is 12457789.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79459396 + 19316025 = 8914^2 + 4395^2 .

It is a cyclic number.

It is not a de Polignac number, because 98775421 - 2¹ = 98775419 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98775431) 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, 1702996 + ... + 1703053.

It is an arithmetic number, because the mean of its divisors is an integer number (25545375).

Almost surely, 2^98775421 is an apocalyptic number.

It is an amenable number.

98775421 is a deficient number, since it is larger than the sum of its proper divisors (3406079).

98775421 is a wasteful number, since it uses less digits than its factorization.

98775421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406078.

The product of its digits is 141120, while the sum is 43.

The square root of 98775421 is about 9938.5824441919. The cubic root of 98775421 is about 462.2564323557.

The spelling of 98775421 in words is "ninety-eight million, seven hundred seventy-five thousand, four hundred twenty-one".