140008649 has 8 divisors (see below), whose sum is σ = 152824320. Its totient is φ = 127207600.

The previous prime is 140008643. The next prime is 140008667. The reversal of 140008649 is 946800041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140008649 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140008643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29459 + ... + 33879.

It is an arithmetic number, because the mean of its divisors is an integer number (19103040).

Almost surely, 2^140008649 is an apocalyptic number.

It is an amenable number.

140008649 is a deficient number, since it is larger than the sum of its proper divisors (12815671).

140008649 is a wasteful number, since it uses less digits than its factorization.

140008649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7311.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 140008649 is about 11832.5250475120. The cubic root of 140008649 is about 519.2601027938.

The spelling of 140008649 in words is "one hundred forty million, eight thousand, six hundred forty-nine".