140877831 has 4 divisors (see below), whose sum is σ = 187837112. Its totient is φ = 93918552.

The previous prime is 140877817. The next prime is 140877839. The reversal of 140877831 is 138778041.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 140877831 - 2⁶ = 140877767 is a prime.

It is a super-2 number, since 2×140877831² = 39693126534529122, which contains 22 as substring.

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 140877831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140877839) 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, 23479636 + ... + 23479641.

It is an arithmetic number, because the mean of its divisors is an integer number (46959278).

Almost surely, 2^140877831 is an apocalyptic number.

140877831 is a deficient number, since it is larger than the sum of its proper divisors (46959281).

140877831 is an equidigital number, since it uses as much as digits as its factorization.

140877831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46959280.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 140877831 is about 11869.1967293495. The cubic root of 140877831 is about 520.3324193530.

The spelling of 140877831 in words is "one hundred forty million, eight hundred seventy-seven thousand, eight hundred thirty-one".