780872533 has 4 divisors (see below), whose sum is σ = 892425760. Its totient is φ = 669319308.

The previous prime is 780872501. The next prime is 780872537. The reversal of 780872533 is 335278087.

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 not a de Polignac number, because 780872533 - 2⁵ = 780872501 is a prime.

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 780872533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780872537) 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, 55776603 + ... + 55776616.

It is an arithmetic number, because the mean of its divisors is an integer number (223106440).

Almost surely, 2^780872533 is an apocalyptic number.

It is an amenable number.

780872533 is a deficient number, since it is larger than the sum of its proper divisors (111553227).

780872533 is a wasteful number, since it uses less digits than its factorization.

780872533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111553226.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 780872533 is about 27944.0965679694. The cubic root of 780872533 is about 920.8595200641.

The spelling of 780872533 in words is "seven hundred eighty million, eight hundred seventy-two thousand, five hundred thirty-three".