7749491 has 2 divisors, whose sum is σ = 7749492. Its totient is φ = 7749490.

The previous prime is 7749487. The next prime is 7749493. The reversal of 7749491 is 1949477.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7749491 - 2² = 7749487 is a prime.

It is a super-3 number, since 3×7749491³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 7749493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7749493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874745 + 3874746.

It is an arithmetic number, because the mean of its divisors is an integer number (3874746).

Almost surely, 2^7749491 is an apocalyptic number.

7749491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7749491 is an equidigital number, since it uses as much as digits as its factorization.

7749491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 7749491 is about 2783.7907608152. The cubic root of 7749491 is about 197.8902479874.

The spelling of 7749491 in words is "seven million, seven hundred forty-nine thousand, four hundred ninety-one".