405142140989 has 2 divisors, whose sum is σ = 405142140990. Its totient is φ = 405142140988.

The previous prime is 405142140983. The next prime is 405142141037. The reversal of 405142140989 is 989041241504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344486824900 + 60655316089 = 586930^2 + 246283^2 .

It is a cyclic number.

It is not a de Polignac number, because 405142140989 - 2⁴ = 405142140973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405142140983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202571070494 + 202571070495.

It is an arithmetic number, because the mean of its divisors is an integer number (202571070495).

Almost surely, 2^405142140989 is an apocalyptic number.

It is an amenable number.

405142140989 is a deficient number, since it is larger than the sum of its proper divisors (1).

405142140989 is an equidigital number, since it uses as much as digits as its factorization.

405142140989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 405142140989 in words is "four hundred five billion, one hundred forty-two million, one hundred forty thousand, nine hundred eighty-nine".