7158989 has 8 divisors (see below), whose sum is σ = 7607160. Its totient is φ = 6713856.

The previous prime is 7158973. The next prime is 7158997. The reversal of 7158989 is 9898517.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 697225 + 6461764 = 835^2 + 2542^2 .

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 7158989 - 2⁴ = 7158973 is a prime.

It is a super-2 number, since 2×7158989² = 102502247004242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7158919) 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, 5777 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (950895).

Almost surely, 2^7158989 is an apocalyptic number.

It is an amenable number.

7158989 is a deficient number, since it is larger than the sum of its proper divisors (448171).

7158989 is a wasteful number, since it uses less digits than its factorization.

7158989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519.

The product of its digits is 181440, while the sum is 47.

The square root of 7158989 is about 2675.6287111630. The cubic root of 7158989 is about 192.7305518971.

The spelling of 7158989 in words is "seven million, one hundred fifty-eight thousand, nine hundred eighty-nine".