7491889 has 8 divisors (see below), whose sum is σ = 7940520. Its totient is φ = 7056000.

The previous prime is 7491853. The next prime is 7491893. The reversal of 7491889 is 9881947.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 245025 + 7246864 = 495^2 + 2692^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7491889 - 2¹¹ = 7489841 is a prime.

It is a super-2 number, since 2×7491889² = 112256801576642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7491839) 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, 1962 + ... + 4339.

It is an arithmetic number, because the mean of its divisors is an integer number (992565).

Almost surely, 2^7491889 is an apocalyptic number.

It is an amenable number.

7491889 is a deficient number, since it is larger than the sum of its proper divisors (448631).

7491889 is a wasteful number, since it uses less digits than its factorization.

7491889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371.

The product of its digits is 145152, while the sum is 46.

The square root of 7491889 is about 2737.1315277129. The cubic root of 7491889 is about 195.6727932916.

The spelling of 7491889 in words is "seven million, four hundred ninety-one thousand, eight hundred eighty-nine".