7140989 has 4 divisors (see below), whose sum is σ = 7387260. Its totient is φ = 6894720.

The previous prime is 7140983. The next prime is 7140997. The reversal of 7140989 is 9890417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6002500 + 1138489 = 2450^2 + 1067^2 .

It is a cyclic number.

It is not a de Polignac number, because 7140989 - 2⁸ = 7140733 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 (7140983) 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, 123092 + ... + 123149.

It is an arithmetic number, because the mean of its divisors is an integer number (1846815).

Almost surely, 2^7140989 is an apocalyptic number.

It is an amenable number.

7140989 is a deficient number, since it is larger than the sum of its proper divisors (246271).

7140989 is a wasteful number, since it uses less digits than its factorization.

7140989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246270.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 7140989 is about 2672.2628987433. The cubic root of 7140989 is about 192.5688874720.

The spelling of 7140989 in words is "seven million, one hundred forty thousand, nine hundred eighty-nine".