1525914989 has 2 divisors, whose sum is σ = 1525914990. Its totient is φ = 1525914988.

The previous prime is 1525914983. The next prime is 1525914991. The reversal of 1525914989 is 9894195251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825412900 + 700502089 = 28730^2 + 26467^2 .

It is an emirp because it is prime and its reverse (9894195251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1525914989 is a prime.

Together with 1525914991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1525914989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525914983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762957494 + 762957495.

It is an arithmetic number, because the mean of its divisors is an integer number (762957495).

Almost surely, 2^1525914989 is an apocalyptic number.

It is an amenable number.

1525914989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525914989 is an equidigital number, since it uses as much as digits as its factorization.

1525914989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 53.

The square root of 1525914989 is about 39062.9618564696. The cubic root of 1525914989 is about 1151.2689179407.

The spelling of 1525914989 in words is "one billion, five hundred twenty-five million, nine hundred fourteen thousand, nine hundred eighty-nine".