140878687 has 4 divisors (see below), whose sum is σ = 141988096. Its totient is φ = 139769280.

The previous prime is 140878679. The next prime is 140878691. The reversal of 140878687 is 786878041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786878041 = 1171 ⋅671971.

It is a cyclic number.

It is not a de Polignac number, because 140878687 - 2³ = 140878679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140878687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140878627) 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, 554514 + ... + 554767.

It is an arithmetic number, because the mean of its divisors is an integer number (35497024).

Almost surely, 2^140878687 is an apocalyptic number.

140878687 is a deficient number, since it is larger than the sum of its proper divisors (1109409).

140878687 is a wasteful number, since it uses less digits than its factorization.

140878687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109408.

The product of its (nonzero) digits is 602112, while the sum is 49.

The square root of 140878687 is about 11869.2327890222. The cubic root of 140878687 is about 520.3334732299. Note that the first 3 decimals are identical.

The spelling of 140878687 in words is "one hundred forty million, eight hundred seventy-eight thousand, six hundred eighty-seven".