7649749 has 2 divisors, whose sum is σ = 7649750. Its totient is φ = 7649748.

The previous prime is 7649737. The next prime is 7649783. The reversal of 7649749 is 9479467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6036849 + 1612900 = 2457^2 + 1270^2 .

It is an emirp because it is prime and its reverse (9479467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7649749 - 2⁹ = 7649237 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7649699 and 7649708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7649249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3824874 + 3824875.

It is an arithmetic number, because the mean of its divisors is an integer number (3824875).

Almost surely, 2^7649749 is an apocalyptic number.

It is an amenable number.

7649749 is a deficient number, since it is larger than the sum of its proper divisors (1).

7649749 is an equidigital number, since it uses as much as digits as its factorization.

7649749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 7649749 is about 2765.8179621949. The cubic root of 7649749 is about 197.0375786146.

The spelling of 7649749 in words is "seven million, six hundred forty-nine thousand, seven hundred forty-nine".