2602491989 has 2 divisors, whose sum is σ = 2602491990. Its totient is φ = 2602491988.

The previous prime is 2602491973. The next prime is 2602492033. The reversal of 2602491989 is 9891942062.

It is a happy number.

2602491989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2595902500 + 6589489 = 50950^2 + 2567^2 .

It is a cyclic number.

It is not a de Polignac number, because 2602491989 - 2⁴ = 2602491973 is a prime.

It is a super-2 number, since 2×2602491989² = 13545929105618352242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2602491289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1301245994 + 1301245995.

It is an arithmetic number, because the mean of its divisors is an integer number (1301245995).

Almost surely, 2^2602491989 is an apocalyptic number.

It is an amenable number.

2602491989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2602491989 is an equidigital number, since it uses as much as digits as its factorization.

2602491989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 2602491989 is about 51014.6252460998. The cubic root of 2602491989 is about 1375.5080417287.

The spelling of 2602491989 in words is "two billion, six hundred two million, four hundred ninety-one thousand, nine hundred eighty-nine".