140443961 has 4 divisors (see below), whose sum is σ = 160507392. Its totient is φ = 120380532.

The previous prime is 140443951. The next prime is 140443967. The reversal of 140443961 is 169344041.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 140443961 - 2¹⁴ = 140427577 is a prime.

It is a super-3 number, since 3×140443961³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140443967) 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, 10031705 + ... + 10031718.

It is an arithmetic number, because the mean of its divisors is an integer number (40126848).

Almost surely, 2^140443961 is an apocalyptic number.

It is an amenable number.

140443961 is a deficient number, since it is larger than the sum of its proper divisors (20063431).

140443961 is an equidigital number, since it uses as much as digits as its factorization.

140443961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20063430.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 140443961 is about 11850.9054928305. The cubic root of 140443961 is about 519.7977036084.

The spelling of 140443961 in words is "one hundred forty million, four hundred forty-three thousand, nine hundred sixty-one".