140394649 has 2 divisors, whose sum is σ = 140394650. Its totient is φ = 140394648.

The previous prime is 140394637. The next prime is 140394679. The reversal of 140394649 is 946493041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111450249 + 28944400 = 10557^2 + 5380^2 .

It is a cyclic number.

It is not a de Polignac number, because 140394649 - 2⁷ = 140394521 is a prime.

It is a Chen prime.

It is equal to p_7933189 and since 140394649 and 7933189 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (140394679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70197324 + 70197325.

It is an arithmetic number, because the mean of its divisors is an integer number (70197325).

Almost surely, 2^140394649 is an apocalyptic number.

It is an amenable number.

140394649 is a deficient number, since it is larger than the sum of its proper divisors (1).

140394649 is an equidigital number, since it uses as much as digits as its factorization.

140394649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 140394649 is about 11848.8247940460. The cubic root of 140394649 is about 519.7368602069.

The spelling of 140394649 in words is "one hundred forty million, three hundred ninety-four thousand, six hundred forty-nine".