2539469869 has 2 divisors, whose sum is σ = 2539469870. Its totient is φ = 2539469868.

The previous prime is 2539469857. The next prime is 2539469953. The reversal of 2539469869 is 9689649352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2444016969 + 95452900 = 49437^2 + 9770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539469869 - 2⁵ = 2539469837 is a prime.

It is a super-2 number, since 2×2539469869² = 12897814431117754322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2539469839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269734934 + 1269734935.

It is an arithmetic number, because the mean of its divisors is an integer number (1269734935).

Almost surely, 2^2539469869 is an apocalyptic number.

It is an amenable number.

2539469869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539469869 is an equidigital number, since it uses as much as digits as its factorization.

2539469869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 61.

The square root of 2539469869 is about 50393.1529972079. The cubic root of 2539469869 is about 1364.3140598637.

The spelling of 2539469869 in words is "two billion, five hundred thirty-nine million, four hundred sixty-nine thousand, eight hundred sixty-nine".