742900009 has 2 divisors, whose sum is σ = 742900010. Its totient is φ = 742900008.

The previous prime is 742899991. The next prime is 742900013. The reversal of 742900009 is 900009247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380835225 + 362064784 = 19515^2 + 19028^2 .

It is an emirp because it is prime and its reverse (900009247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 742900009 - 2¹⁷ = 742768937 is a prime.

It is not a weakly prime, because it can be changed into another prime (742900309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371450004 + 371450005.

It is an arithmetic number, because the mean of its divisors is an integer number (371450005).

Almost surely, 2^742900009 is an apocalyptic number.

It is an amenable number.

742900009 is a deficient number, since it is larger than the sum of its proper divisors (1).

742900009 is an equidigital number, since it uses as much as digits as its factorization.

742900009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 742900009 is about 27256.1921221582. The cubic root of 742900009 is about 905.6841926823.

The spelling of 742900009 in words is "seven hundred forty-two million, nine hundred thousand, nine".