1525346489 has 2 divisors, whose sum is σ = 1525346490. Its totient is φ = 1525346488.

The previous prime is 1525346483. The next prime is 1525346491. The reversal of 1525346489 is 9846435251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1290030889 + 235315600 = 35917^2 + 15340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1525346489 is a prime.

Together with 1525346491, 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 (1525346483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762673244 + 762673245.

It is an arithmetic number, because the mean of its divisors is an integer number (762673245).

Almost surely, 2^1525346489 is an apocalyptic number.

It is an amenable number.

1525346489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525346489 is an equidigital number, since it uses as much as digits as its factorization.

1525346489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 47.

The square root of 1525346489 is about 39055.6844646205. The cubic root of 1525346489 is about 1151.1259266466.

The spelling of 1525346489 in words is "one billion, five hundred twenty-five million, three hundred forty-six thousand, four hundred eighty-nine".