775117749 has 32 divisors (see below), whose sum is σ = 1269780480. Its totient is φ = 410674752.

The previous prime is 775117747. The next prime is 775117781. The reversal of 775117749 is 947711577.

It is a happy number.

It is not a de Polignac number, because 775117749 - 2¹ = 775117747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775117698 and 775117707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775117741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1914 + ... + 39419.

It is an arithmetic number, because the mean of its divisors is an integer number (39680640).

Almost surely, 2^775117749 is an apocalyptic number.

It is an amenable number.

775117749 is a deficient number, since it is larger than the sum of its proper divisors (494662731).

775117749 is a wasteful number, since it uses less digits than its factorization.

775117749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41409.

The product of its digits is 432180, while the sum is 48.

The square root of 775117749 is about 27840.9365682981. The cubic root of 775117749 is about 918.5917921299.

The spelling of 775117749 in words is "seven hundred seventy-five million, one hundred seventeen thousand, seven hundred forty-nine".