7740149 has 2 divisors, whose sum is σ = 7740150. Its totient is φ = 7740148.

The previous prime is 7740143. The next prime is 7740157. The reversal of 7740149 is 9410477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7739524 + 625 = 2782^2 + 25^2 .

It is an emirp because it is prime and its reverse (9410477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7740149 - 2⁴ = 7740133 is a prime.

It is a Sophie Germain 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 (7740143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3870074 + 3870075.

It is an arithmetic number, because the mean of its divisors is an integer number (3870075).

Almost surely, 2^7740149 is an apocalyptic number.

It is an amenable number.

7740149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7740149 is an equidigital number, since it uses as much as digits as its factorization.

7740149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 7740149 is about 2782.1123269918. The cubic root of 7740149 is about 197.8106972118.

The spelling of 7740149 in words is "seven million, seven hundred forty thousand, one hundred forty-nine".