771864101 has 4 divisors (see below), whose sum is σ = 774650892. Its totient is φ = 769077312.

The previous prime is 771864089. The next prime is 771864131. The reversal of 771864101 is 101468177.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73530625 + 698333476 = 8575^2 + 26426^2 .

It is a cyclic number.

It is not a de Polignac number, because 771864101 - 2¹⁰ = 771863077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771864131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392980 + ... + 1393533.

It is an arithmetic number, because the mean of its divisors is an integer number (193662723).

Almost surely, 2^771864101 is an apocalyptic number.

It is an amenable number.

771864101 is a deficient number, since it is larger than the sum of its proper divisors (2786791).

771864101 is a wasteful number, since it uses less digits than its factorization.

771864101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786790.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 771864101 is about 27782.4423152465. The cubic root of 771864101 is about 917.3046904641.

The spelling of 771864101 in words is "seven hundred seventy-one million, eight hundred sixty-four thousand, one hundred one".