525387491 has 2 divisors, whose sum is σ = 525387492. Its totient is φ = 525387490.

The previous prime is 525387391. The next prime is 525387493. The reversal of 525387491 is 194783525.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 525387491 - 2¹⁴ = 525371107 is a prime.

Together with 525387493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (525387493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262693745 + 262693746.

It is an arithmetic number, because the mean of its divisors is an integer number (262693746).

Almost surely, 2^525387491 is an apocalyptic number.

525387491 is a deficient number, since it is larger than the sum of its proper divisors (1).

525387491 is an equidigital number, since it uses as much as digits as its factorization.

525387491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 44.

The square root of 525387491 is about 22921.3326619549. The cubic root of 525387491 is about 806.9127469265.

The spelling of 525387491 in words is "five hundred twenty-five million, three hundred eighty-seven thousand, four hundred ninety-one".