7149689 has 8 divisors (see below), whose sum is σ = 7472520. Its totient is φ = 6832000.

The previous prime is 7149677. The next prime is 7149691. The reversal of 7149689 is 9869417.

It can be written as a sum of positive squares in 4 ways, for example, as 1428025 + 5721664 = 1195^2 + 2392^2 .

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 7149689 - 2⁸ = 7149433 is a prime.

It is a super-2 number, since 2×7149689² = 102236105593442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7149589) 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, 1709 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (934065).

Almost surely, 2^7149689 is an apocalyptic number.

It is an amenable number.

7149689 is a deficient number, since it is larger than the sum of its proper divisors (322831).

7149689 is a wasteful number, since it uses less digits than its factorization.

7149689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571.

The product of its digits is 108864, while the sum is 44.

The square root of 7149689 is about 2673.8902370890. The cubic root of 7149689 is about 192.6470591562.

The spelling of 7149689 in words is "seven million, one hundred forty-nine thousand, six hundred eighty-nine".