1525323749 has 2 divisors, whose sum is σ = 1525323750. Its totient is φ = 1525323748.

The previous prime is 1525323733. The next prime is 1525323769. The reversal of 1525323749 is 9473235251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1464592900 + 60730849 = 38270^2 + 7793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525323749 - 2⁴ = 1525323733 is a prime.

It is a super-2 number, since 2×1525323749² = 4653225078526830002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525323769) 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, 762661874 + 762661875.

It is an arithmetic number, because the mean of its divisors is an integer number (762661875).

Almost surely, 2^1525323749 is an apocalyptic number.

It is an amenable number.

1525323749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525323749 is an equidigital number, since it uses as much as digits as its factorization.

1525323749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 41.

The square root of 1525323749 is about 39055.3933407410. The cubic root of 1525323749 is about 1151.1202062559.

The spelling of 1525323749 in words is "one billion, five hundred twenty-five million, three hundred twenty-three thousand, seven hundred forty-nine".