775649951 has 2 divisors, whose sum is σ = 775649952. Its totient is φ = 775649950.

The previous prime is 775649947. The next prime is 775649957. The reversal of 775649951 is 159946577.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 775649951 - 2² = 775649947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775649893 and 775649902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775649957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387824975 + 387824976.

It is an arithmetic number, because the mean of its divisors is an integer number (387824976).

Almost surely, 2^775649951 is an apocalyptic number.

775649951 is a deficient number, since it is larger than the sum of its proper divisors (1).

775649951 is an equidigital number, since it uses as much as digits as its factorization.

775649951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 53.

The square root of 775649951 is about 27850.4928322642. The cubic root of 775649951 is about 918.8019815037.

The spelling of 775649951 in words is "seven hundred seventy-five million, six hundred forty-nine thousand, nine hundred fifty-one".