525387397 has 8 divisors (see below), whose sum is σ = 558365400. Its totient is φ = 492639744.

The previous prime is 525387391. The next prime is 525387491. The reversal of 525387397 is 793783525.

It can be written as a sum of positive squares in 4 ways, for example, as 48358116 + 477029281 = 6954^2 + 21841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525387397 - 2¹⁹ = 524863109 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 525387397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525387391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52872 + ... + 62017.

It is an arithmetic number, because the mean of its divisors is an integer number (69795675).

Almost surely, 2^525387397 is an apocalyptic number.

It is an amenable number.

525387397 is a deficient number, since it is larger than the sum of its proper divisors (32978003).

525387397 is a wasteful number, since it uses less digits than its factorization.

525387397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115175.

The product of its digits is 1587600, while the sum is 49.

The square root of 525387397 is about 22921.3306114632. The cubic root of 525387397 is about 806.9126988034.

The spelling of 525387397 in words is "five hundred twenty-five million, three hundred eighty-seven thousand, three hundred ninety-seven".