771748993 has 16 divisors (see below), whose sum is σ = 802137600. Its totient is φ = 742008960.

The previous prime is 771748963. The next prime is 771749009. The reversal of 771748993 is 399847177.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-771748993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (771748933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1610928 + ... + 1611406.

It is an arithmetic number, because the mean of its divisors is an integer number (50133600).

Almost surely, 2^771748993 is an apocalyptic number.

It is an amenable number.

771748993 is a deficient number, since it is larger than the sum of its proper divisors (30388607).

771748993 is a wasteful number, since it uses less digits than its factorization.

771748993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032.

The product of its digits is 2667168, while the sum is 55.

The square root of 771748993 is about 27780.3706418759. The cubic root of 771748993 is about 917.2590890181.

The spelling of 771748993 in words is "seven hundred seventy-one million, seven hundred forty-eight thousand, nine hundred ninety-three".