525899149 has 4 divisors (see below), whose sum is σ = 526811164. Its totient is φ = 524987136.

The previous prime is 525899141. The next prime is 525899173. The reversal of 525899149 is 941998525.

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

It can be written as a sum of positive squares in 2 ways, for example, as 459802249 + 66096900 = 21443^2 + 8130^2 .

It is a cyclic number.

It is not a de Polignac number, because 525899149 - 2³ = 525899141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 525899096 and 525899105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525899141) 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, 455142 + ... + 456295.

It is an arithmetic number, because the mean of its divisors is an integer number (131702791).

Almost surely, 2^525899149 is an apocalyptic number.

It is an amenable number.

525899149 is a deficient number, since it is larger than the sum of its proper divisors (912015).

525899149 is an equidigital number, since it uses as much as digits as its factorization.

525899149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912014.

The product of its digits is 1166400, while the sum is 52.

The square root of 525899149 is about 22932.4911206785. The cubic root of 525899149 is about 807.1746040745.

The spelling of 525899149 in words is "five hundred twenty-five million, eight hundred ninety-nine thousand, one hundred forty-nine".