140561791 has 8 divisors (see below), whose sum is σ = 148121600. Its totient is φ = 133018200.

The previous prime is 140561789. The next prime is 140561807. The reversal of 140561791 is 197165041.

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

It is a cyclic number.

It is not a de Polignac number, because 140561791 - 2¹ = 140561789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140561761) 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, 16450 + ... + 23488.

It is an arithmetic number, because the mean of its divisors is an integer number (18515200).

Almost surely, 2^140561791 is an apocalyptic number.

140561791 is a deficient number, since it is larger than the sum of its proper divisors (7559809).

140561791 is a wasteful number, since it uses less digits than its factorization.

140561791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 140561791 is about 11855.8758006315. The cubic root of 140561791 is about 519.9430300013.

The spelling of 140561791 in words is "one hundred forty million, five hundred sixty-one thousand, seven hundred ninety-one".