1002540389 has 2 divisors, whose sum is σ = 1002540390. Its totient is φ = 1002540388.

The previous prime is 1002540379. The next prime is 1002540433. The reversal of 1002540389 is 9830452001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 949687489 + 52852900 = 30817^2 + 7270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002540389 - 2²⁸ = 734104933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002540359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501270194 + 501270195.

It is an arithmetic number, because the mean of its divisors is an integer number (501270195).

Almost surely, 2^1002540389 is an apocalyptic number.

It is an amenable number.

1002540389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002540389 is an equidigital number, since it uses as much as digits as its factorization.

1002540389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1002540389 is about 31662.9182009492. The cubic root of 1002540389 is about 1000.8460802796.

The spelling of 1002540389 in words is "one billion, two million, five hundred forty thousand, three hundred eighty-nine".