140064961 has 4 divisors (see below), whose sum is σ = 140098500. Its totient is φ = 140031424.

The previous prime is 140064959. The next prime is 140064971. The reversal of 140064961 is 169460041.

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 81450625 + 58614336 = 9025^2 + 7656^2 .

It is a cyclic number.

It is not a de Polignac number, because 140064961 - 2¹ = 140064959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140064971) 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 in 3 ways as a sum of consecutive naturals, for example, 9436 + ... + 19213.

It is an arithmetic number, because the mean of its divisors is an integer number (35024625).

Almost surely, 2^140064961 is an apocalyptic number.

It is an amenable number.

140064961 is a deficient number, since it is larger than the sum of its proper divisors (33539).

140064961 is an equidigital number, since it uses as much as digits as its factorization.

140064961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33538.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 140064961 is about 11834.9043511133. The cubic root of 140064961 is about 519.3297095783.

The spelling of 140064961 in words is "one hundred forty million, sixty-four thousand, nine hundred sixty-one".