99940489 has 4 divisors (see below), whose sum is σ = 109026000. Its totient is φ = 90854980.

The previous prime is 99940429. The next prime is 99940499. The reversal of 99940489 is 98404999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99940489 - 2¹¹ = 99938441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99940429) 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, 4542739 + ... + 4542760.

It is an arithmetic number, because the mean of its divisors is an integer number (27256500).

Almost surely, 2^99940489 is an apocalyptic number.

It is an amenable number.

99940489 is a deficient number, since it is larger than the sum of its proper divisors (9085511).

99940489 is a wasteful number, since it uses less digits than its factorization.

99940489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9085510.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 99940489 is about 9997.0240071733. The cubic root of 99940489 is about 464.0667898926.

The spelling of 99940489 in words is "ninety-nine million, nine hundred forty thousand, four hundred eighty-nine".