1000140649 has 2 divisors, whose sum is σ = 1000140650. Its totient is φ = 1000140648.

The previous prime is 1000140643. The next prime is 1000140667. The reversal of 1000140649 is 9460410001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 970634025 + 29506624 = 31155^2 + 5432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000140649 - 2⁹ = 1000140137 is a prime.

It is a super-3 number, since 3×1000140649³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1000140643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500070324 + 500070325.

It is an arithmetic number, because the mean of its divisors is an integer number (500070325).

Almost surely, 2^1000140649 is an apocalyptic number.

It is an amenable number.

1000140649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000140649 is an equidigital number, since it uses as much as digits as its factorization.

1000140649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1000140649 is about 31625.0003794466. Note that the first 3 decimals coincide. The cubic root of 1000140649 is about 1000.0468808022.

The spelling of 1000140649 in words is "one billion, one hundred forty thousand, six hundred forty-nine".