525490391 has 8 divisors (see below), whose sum is σ = 568098480. Its totient is φ = 484377408.

The previous prime is 525490367. The next prime is 525490397. The reversal of 525490391 is 193094525.

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 525490391 - 2⁶ = 525490327 is a prime.

It is a super-2 number, since 2×525490391² = 552280302066665762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525490397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373046 + ... + 374451.

It is an arithmetic number, because the mean of its divisors is an integer number (71012310).

Almost surely, 2^525490391 is an apocalyptic number.

525490391 is a deficient number, since it is larger than the sum of its proper divisors (42608089).

525490391 is a wasteful number, since it uses less digits than its factorization.

525490391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747553.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 525490391 is about 22923.5771859455. The cubic root of 525490391 is about 806.9654229056.

The spelling of 525490391 in words is "five hundred twenty-five million, four hundred ninety thousand, three hundred ninety-one".