98957921 has 16 divisors (see below), whose sum is σ = 106326528. Its totient is φ = 91929600.

The previous prime is 98957917. The next prime is 98957933. The reversal of 98957921 is 12975989.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 98957921 - 2² = 98957917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 98957921.

It is not an unprimeable number, because it can be changed into a prime (98957951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80705 + ... + 81921.

It is an arithmetic number, because the mean of its divisors is an integer number (6645408).

Almost surely, 2^98957921 is an apocalyptic number.

It is an amenable number.

98957921 is a deficient number, since it is larger than the sum of its proper divisors (7368607).

98957921 is a wasteful number, since it uses less digits than its factorization.

98957921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352.

The product of its digits is 408240, while the sum is 50.

The square root of 98957921 is about 9947.7595970148. The cubic root of 98957921 is about 462.5409494787.

The spelling of 98957921 in words is "ninety-eight million, nine hundred fifty-seven thousand, nine hundred twenty-one".