7749997 has 2 divisors, whose sum is σ = 7749998. Its totient is φ = 7749996.

The previous prime is 7749961. The next prime is 7750003. The reversal of 7749997 is 7999477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3884841 + 3865156 = 1971^2 + 1966^2 .

It is an emirp because it is prime and its reverse (7999477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7749997 - 2⁷ = 7749869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7749947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874998 + 3874999.

It is an arithmetic number, because the mean of its divisors is an integer number (3874999).

Almost surely, 2^7749997 is an apocalyptic number.

It is an amenable number.

7749997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7749997 is an equidigital number, since it uses as much as digits as its factorization.

7749997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000188, while the sum is 52.

The square root of 7749997 is about 2783.8816425991. The cubic root of 7749997 is about 197.8945549492.

The spelling of 7749997 in words is "seven million, seven hundred forty-nine thousand, nine hundred ninety-seven".