140528879 has 4 divisors (see below), whose sum is σ = 140811000. Its totient is φ = 140246760.

The previous prime is 140528863. The next prime is 140528881. The reversal of 140528879 is 978825041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978825041 = 53 ⋅18468397.

It is a cyclic number.

It is not a de Polignac number, because 140528879 - 2⁴ = 140528863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140527879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140312 + ... + 141309.

It is an arithmetic number, because the mean of its divisors is an integer number (35202750).

Almost surely, 2^140528879 is an apocalyptic number.

140528879 is a deficient number, since it is larger than the sum of its proper divisors (282121).

140528879 is an equidigital number, since it uses as much as digits as its factorization.

140528879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282120.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 140528879 is about 11854.4877156290. The cubic root of 140528879 is about 519.9024459501.

The spelling of 140528879 in words is "one hundred forty million, five hundred twenty-eight thousand, eight hundred seventy-nine".