525378779 has 4 divisors (see below), whose sum is σ = 525533784. Its totient is φ = 525223776.

The previous prime is 525378751. The next prime is 525378781. The reversal of 525378779 is 977873525.

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 525378779 - 2¹² = 525374683 is a prime.

It is a super-2 number, since 2×525378779² = 552045722847061682, 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 525378779.

It is not an unprimeable number, because it can be changed into a prime (525378739) 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, 72302 + ... + 79235.

It is an arithmetic number, because the mean of its divisors is an integer number (131383446).

Almost surely, 2^525378779 is an apocalyptic number.

525378779 is a deficient number, since it is larger than the sum of its proper divisors (155005).

525378779 is a wasteful number, since it uses less digits than its factorization.

525378779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155004.

The product of its digits is 3704400, while the sum is 53.

The square root of 525378779 is about 22921.1426198608. The cubic root of 525378779 is about 806.9082868135.

It can be divided in two parts, 52537 and 8779, that added together give a palindrome (61316).

The spelling of 525378779 in words is "five hundred twenty-five million, three hundred seventy-eight thousand, seven hundred seventy-nine".