7638149 has 2 divisors, whose sum is σ = 7638150. Its totient is φ = 7638148.

The previous prime is 7638143. The next prime is 7638167. The reversal of 7638149 is 9418367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5373124 + 2265025 = 2318^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 7638149 - 2¹⁶ = 7572613 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7638143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819074 + 3819075.

It is an arithmetic number, because the mean of its divisors is an integer number (3819075).

Almost surely, 2^7638149 is an apocalyptic number.

It is an amenable number.

7638149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638149 is an equidigital number, since it uses as much as digits as its factorization.

7638149 is an evil number, because the sum of its binary digits is even.

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

The square root of 7638149 is about 2763.7201377853. The cubic root of 7638149 is about 196.9379329839.

The spelling of 7638149 in words is "seven million, six hundred thirty-eight thousand, one hundred forty-nine".