775140889 has 4 divisors (see below), whose sum is σ = 786710224. Its totient is φ = 763571556.

The previous prime is 775140887. The next prime is 775140907. The reversal of 775140889 is 988041577.

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 775140889 - 2¹ = 775140887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775140881) 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, 5784567 + ... + 5784700.

It is an arithmetic number, because the mean of its divisors is an integer number (196677556).

Almost surely, 2^775140889 is an apocalyptic number.

It is an amenable number.

775140889 is a deficient number, since it is larger than the sum of its proper divisors (11569335).

775140889 is a wasteful number, since it uses less digits than its factorization.

775140889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11569334.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 775140889 is about 27841.3521402966. The cubic root of 775140889 is about 918.6009331077.

The spelling of 775140889 in words is "seven hundred seventy-five million, one hundred forty thousand, eight hundred eighty-nine".