1240302989 has 2 divisors, whose sum is σ = 1240302990. Its totient is φ = 1240302988.

The previous prime is 1240302971. The next prime is 1240303039. The reversal of 1240302989 is 9892030421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1120575625 + 119727364 = 33475^2 + 10942^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240302989 - 2⁸ = 1240302733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240308989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620151494 + 620151495.

It is an arithmetic number, because the mean of its divisors is an integer number (620151495).

Almost surely, 2^1240302989 is an apocalyptic number.

It is an amenable number.

1240302989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240302989 is an equidigital number, since it uses as much as digits as its factorization.

1240302989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1240302989 is about 35217.9356152515. The cubic root of 1240302989 is about 1074.4245671733.

The spelling of 1240302989 in words is "one billion, two hundred forty million, three hundred two thousand, nine hundred eighty-nine".