140643535 has 4 divisors (see below), whose sum is σ = 168772248. Its totient is φ = 112514824.

The previous prime is 140643521. The next prime is 140643541. The reversal of 140643535 is 535346041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 535346041 = 131 ⋅4086611.

It is a cyclic number.

It is not a de Polignac number, because 140643535 - 2²¹ = 138546383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140643497 and 140643506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14064349 + ... + 14064358.

It is an arithmetic number, because the mean of its divisors is an integer number (42193062).

Almost surely, 2^140643535 is an apocalyptic number.

140643535 is a deficient number, since it is larger than the sum of its proper divisors (28128713).

140643535 is an equidigital number, since it uses as much as digits as its factorization.

140643535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28128712.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 140643535 is about 11859.3227041008. The cubic root of 140643535 is about 520.0438017837.

Adding to 140643535 its reverse (535346041), we get a palindrome (675989576).

The spelling of 140643535 in words is "one hundred forty million, six hundred forty-three thousand, five hundred thirty-five".