7138649 has 16 divisors (see below), whose sum is σ = 8564736. Its totient is φ = 5821200.

The previous prime is 7138643. The next prime is 7138673. The reversal of 7138649 is 9468317.

It is not a de Polignac number, because 7138649 - 2⁸ = 7138393 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7138643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14294 + ... + 14784.

It is an arithmetic number, because the mean of its divisors is an integer number (535296).

Almost surely, 2^7138649 is an apocalyptic number.

It is an amenable number.

7138649 is a deficient number, since it is larger than the sum of its proper divisors (1426087).

7138649 is a wasteful number, since it uses less digits than its factorization.

7138649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its digits is 36288, while the sum is 38.

The square root of 7138649 is about 2671.8250316965. The cubic root of 7138649 is about 192.5478511503.

The spelling of 7138649 in words is "seven million, one hundred thirty-eight thousand, six hundred forty-nine".