1000173649 has 2 divisors, whose sum is σ = 1000173650. Its totient is φ = 1000173648.

The previous prime is 1000173611. The next prime is 1000173667. The reversal of 1000173649 is 9463710001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 910530625 + 89643024 = 30175^2 + 9468^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000173649 - 2¹⁵ = 1000140881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000173649.

It is not a weakly prime, because it can be changed into another prime (1000173149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500086824 + 500086825.

It is an arithmetic number, because the mean of its divisors is an integer number (500086825).

Almost surely, 2^1000173649 is an apocalyptic number.

It is an amenable number.

1000173649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000173649 is an equidigital number, since it uses as much as digits as its factorization.

1000173649 is an evil number, because the sum of its binary digits is even.

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

The square root of 1000173649 is about 31625.5221142671. The cubic root of 1000173649 is about 1000.0578796499.

The spelling of 1000173649 in words is "one billion, one hundred seventy-three thousand, six hundred forty-nine".