775749701 has 2 divisors, whose sum is σ = 775749702. Its totient is φ = 775749700.

The previous prime is 775749691. The next prime is 775749703. The reversal of 775749701 is 107947577.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418161601 + 357588100 = 20449^2 + 18910^2 .

It is an emirp because it is prime and its reverse (107947577) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775749701 is a prime.

Together with 775749703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775749703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387874850 + 387874851.

It is an arithmetic number, because the mean of its divisors is an integer number (387874851).

Almost surely, 2^775749701 is an apocalyptic number.

It is an amenable number.

775749701 is a deficient number, since it is larger than the sum of its proper divisors (1).

775749701 is an equidigital number, since it uses as much as digits as its factorization.

775749701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432180, while the sum is 47.

The square root of 775749701 is about 27852.2835868085. The cubic root of 775749701 is about 918.8413663529.

The spelling of 775749701 in words is "seven hundred seventy-five million, seven hundred forty-nine thousand, seven hundred one".