140344081 has 4 divisors (see below), whose sum is σ = 141273664. Its totient is φ = 139414500.

The previous prime is 140344073. The next prime is 140344109. The reversal of 140344081 is 180443041.

140344081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180443041 = 257 ⋅702113.

It is a cyclic number.

It is not a de Polignac number, because 140344081 - 2³ = 140344073 is a prime.

It is a super-2 number, since 2×140344081² = 39392922143469122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141344081) 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, 464565 + ... + 464866.

It is an arithmetic number, because the mean of its divisors is an integer number (35318416).

Almost surely, 2^140344081 is an apocalyptic number.

It is an amenable number.

140344081 is a deficient number, since it is larger than the sum of its proper divisors (929583).

140344081 is an equidigital number, since it uses as much as digits as its factorization.

140344081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929582.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 140344081 is about 11846.6907193528. The cubic root of 140344081 is about 519.6744522974.

The spelling of 140344081 in words is "one hundred forty million, three hundred forty-four thousand, eighty-one".