140343993 has 12 divisors (see below), whose sum is σ = 214643988. Its totient is φ = 88058880.

The previous prime is 140343979. The next prime is 140344007. The reversal of 140343993 is 399343041.

It is an interprime number because it is at equal distance from previous prime (140343979) and next prime (140344007).

It can be written as a sum of positive squares in 2 ways, for example, as 61968384 + 78375609 = 7872^2 + 8853^2 .

It is not a de Polignac number, because 140343993 - 2⁴ = 140343977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140343193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 458488 + ... + 458793.

It is an arithmetic number, because the mean of its divisors is an integer number (17886999).

Almost surely, 2^140343993 is an apocalyptic number.

It is an amenable number.

140343993 is a deficient number, since it is larger than the sum of its proper divisors (74299995).

140343993 is a wasteful number, since it uses less digits than its factorization.

140343993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917304 (or 917301 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 140343993 is about 11846.6870052348. The cubic root of 140343993 is about 519.6743436802.

The spelling of 140343993 in words is "one hundred forty million, three hundred forty-three thousand, nine hundred ninety-three".