525539749 has 24 divisors (see below), whose sum is σ = 635114520. Its totient is φ = 433230336.

The previous prime is 525539713. The next prime is 525539761. The reversal of 525539749 is 947935525.

It can be written as a sum of positive squares in 4 ways, for example, as 194044900 + 331494849 = 13930^2 + 18207^2 .

It is not a de Polignac number, because 525539749 - 2¹⁵ = 525506981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525539779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159729 + ... + 162985.

It is an arithmetic number, because the mean of its divisors is an integer number (26463105).

Almost surely, 2^525539749 is an apocalyptic number.

It is an amenable number.

525539749 is a deficient number, since it is larger than the sum of its proper divisors (109574771).

525539749 is a wasteful number, since it uses less digits than its factorization.

525539749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397 (or 3390 counting only the distinct ones).

The product of its digits is 1701000, while the sum is 49.

The square root of 525539749 is about 22924.6537378430. The cubic root of 525539749 is about 806.9906875302.

The spelling of 525539749 in words is "five hundred twenty-five million, five hundred thirty-nine thousand, seven hundred forty-nine".