140805965 has 4 divisors (see below), whose sum is σ = 168967164. Its totient is φ = 112644768.

The previous prime is 140805961. The next prime is 140805983. The reversal of 140805965 is 569508041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97732996 + 43072969 = 9886^2 + 6563^2 .

It is a cyclic number.

It is not a de Polignac number, because 140805965 - 2² = 140805961 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 (140805961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14080592 + ... + 14080601.

It is an arithmetic number, because the mean of its divisors is an integer number (42241791).

Almost surely, 2^140805965 is an apocalyptic number.

It is an amenable number.

140805965 is a deficient number, since it is larger than the sum of its proper divisors (28161199).

140805965 is an equidigital number, since it uses as much as digits as its factorization.

140805965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28161198.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 140805965 is about 11866.1689268272. The cubic root of 140805965 is about 520.2439252542.

The spelling of 140805965 in words is "one hundred forty million, eight hundred five thousand, nine hundred sixty-five".