2489991 has 8 divisors (see below), whose sum is σ = 3794304. Its totient is φ = 1422840.

The previous prime is 2489947. The next prime is 2489999. The reversal of 2489991 is 1999842.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2489991 - 2¹¹ = 2487943 is a prime.

2489991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59265 + ... + 59306.

It is an arithmetic number, because the mean of its divisors is an integer number (474288).

2^2489991 is an apocalyptic number.

2489991 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2489991 is a deficient number, since it is larger than the sum of its proper divisors (1304313).

2489991 is a wasteful number, since it uses less digits than its factorization.

2489991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118581.

The product of its digits is 46656, while the sum is 42.

The square root of 2489991 is about 1577.9705320442. The cubic root of 2489991 is about 135.5395145351.

The spelling of 2489991 in words is "two million, four hundred eighty-nine thousand, nine hundred ninety-one".