98042921 has 4 divisors (see below), whose sum is σ = 99650244. Its totient is φ = 96435600.

The previous prime is 98042911. The next prime is 98042929. The reversal of 98042921 is 12924089.

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 27667600 + 70375321 = 5260^2 + 8389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98042921 is a prime.

It is a super-2 number, since 2×98042921² = 19224828716424482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98042929) 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, 803570 + ... + 803691.

It is an arithmetic number, because the mean of its divisors is an integer number (24912561).

Almost surely, 2^98042921 is an apocalyptic number.

It is an amenable number.

98042921 is a deficient number, since it is larger than the sum of its proper divisors (1607323).

98042921 is a wasteful number, since it uses less digits than its factorization.

98042921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607322.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 98042921 is about 9901.6625371702. The cubic root of 98042921 is about 461.1109270473.

The spelling of 98042921 in words is "ninety-eight million, forty-two thousand, nine hundred twenty-one".