525430649 has 2 divisors, whose sum is σ = 525430650. Its totient is φ = 525430648.

The previous prime is 525430643. The next prime is 525430657. The reversal of 525430649 is 946034525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499746025 + 25684624 = 22355^2 + 5068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525430649 is a prime.

It is a super-2 number, since 2×525430649² = 552154733817122402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (525430643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262715324 + 262715325.

It is an arithmetic number, because the mean of its divisors is an integer number (262715325).

Almost surely, 2^525430649 is an apocalyptic number.

It is an amenable number.

525430649 is a deficient number, since it is larger than the sum of its proper divisors (1).

525430649 is an equidigital number, since it uses as much as digits as its factorization.

525430649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 525430649 is about 22922.2740800297. The cubic root of 525430649 is about 806.9348409602.

The spelling of 525430649 in words is "five hundred twenty-five million, four hundred thirty thousand, six hundred forty-nine".