7489991 has 4 divisors (see below), whose sum is σ = 7617000. Its totient is φ = 7362984.

The previous prime is 7489987. The next prime is 7490023. The reversal of 7489991 is 1999847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1999847 = 163 ⋅12269.

It is a cyclic number.

It is not a de Polignac number, because 7489991 - 2² = 7489987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7489931) 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, 63416 + ... + 63533.

It is an arithmetic number, because the mean of its divisors is an integer number (1904250).

Almost surely, 2^7489991 is an apocalyptic number.

7489991 is a deficient number, since it is larger than the sum of its proper divisors (127009).

7489991 is a wasteful number, since it uses less digits than its factorization.

7489991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127008.

The product of its digits is 163296, while the sum is 47.

The square root of 7489991 is about 2736.7847924161. The cubic root of 7489991 is about 195.6562679387.

The spelling of 7489991 in words is "seven million, four hundred eighty-nine thousand, nine hundred ninety-one".