1500997409 has 2 divisors, whose sum is σ = 1500997410. Its totient is φ = 1500997408.

The previous prime is 1500997387. The next prime is 1500997423. The reversal of 1500997409 is 9047990051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1463445025 + 37552384 = 38255^2 + 6128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1500997409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1500997409.

It is not a weakly prime, because it can be changed into another prime (1500997469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750498704 + 750498705.

It is an arithmetic number, because the mean of its divisors is an integer number (750498705).

Almost surely, 2^1500997409 is an apocalyptic number.

It is an amenable number.

1500997409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1500997409 is an equidigital number, since it uses as much as digits as its factorization.

1500997409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 1500997409 is about 38742.7078170848. The cubic root of 1500997409 is about 1144.9679081793.

The spelling of 1500997409 in words is "one billion, five hundred million, nine hundred ninety-seven thousand, four hundred nine".