771420563 has 4 divisors (see below), whose sum is σ = 771876840. Its totient is φ = 770964288.

The previous prime is 771420557. The next prime is 771420571. The reversal of 771420563 is 365024177.

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

It is a cyclic number.

It is not a de Polignac number, because 771420563 - 2⁶ = 771420499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (771420553) 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 3 ways as a sum of consecutive naturals, for example, 225593 + ... + 228986.

It is an arithmetic number, because the mean of its divisors is an integer number (192969210).

Almost surely, 2^771420563 is an apocalyptic number.

771420563 is a deficient number, since it is larger than the sum of its proper divisors (456277).

771420563 is a wasteful number, since it uses less digits than its factorization.

771420563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456276.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 771420563 is about 27774.4588246108. The cubic root of 771420563 is about 917.1289525142.

The spelling of 771420563 in words is "seven hundred seventy-one million, four hundred twenty thousand, five hundred sixty-three".