775812013 has 4 divisors (see below), whose sum is σ = 779874048. Its totient is φ = 771749980.

The previous prime is 775811989. The next prime is 775812043. The reversal of 775812013 is 310218577.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 775812013 - 2⁹ = 775811501 is a prime.

It is a super-2 number, since 2×775812013² = 1203768559030224338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 775812013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775812043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2030731 + ... + 2031112.

It is an arithmetic number, because the mean of its divisors is an integer number (194968512).

Almost surely, 2^775812013 is an apocalyptic number.

It is an amenable number.

775812013 is a deficient number, since it is larger than the sum of its proper divisors (4062035).

775812013 is a wasteful number, since it uses less digits than its factorization.

775812013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062034.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 775812013 is about 27853.4021799851. The cubic root of 775812013 is about 918.8659676344.

The spelling of 775812013 in words is "seven hundred seventy-five million, eight hundred twelve thousand, thirteen".