7138949 has 2 divisors, whose sum is σ = 7138950. Its totient is φ = 7138948.

The previous prime is 7138931. The next prime is 7138973. The reversal of 7138949 is 9498317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5094049 + 2044900 = 2257^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 7138949 - 2⁸ = 7138693 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7138919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569474 + 3569475.

It is an arithmetic number, because the mean of its divisors is an integer number (3569475).

Almost surely, 2^7138949 is an apocalyptic number.

It is an amenable number.

7138949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138949 is an equidigital number, since it uses as much as digits as its factorization.

7138949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 7138949 is about 2671.8811725075. The cubic root of 7138949 is about 192.5505483715.

The spelling of 7138949 in words is "seven million, one hundred thirty-eight thousand, nine hundred forty-nine".