140890931 has 4 divisors (see below), whose sum is σ = 144698832. Its totient is φ = 137083032.

The previous prime is 140890901. The next prime is 140890963. The reversal of 140890931 is 139098041.

140890931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139098041 = 373 ⋅372917.

It is a cyclic number.

It is not a de Polignac number, because 140890931 - 2¹⁰ = 140889907 is a prime.

It is a super-2 number, since 2×140890931² = 39700508876093522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140890891 and 140890900.

It is not an unprimeable number, because it can be changed into a prime (140890901) 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, 1903895 + ... + 1903968.

It is an arithmetic number, because the mean of its divisors is an integer number (36174708).

Almost surely, 2^140890931 is an apocalyptic number.

140890931 is a deficient number, since it is larger than the sum of its proper divisors (3807901).

140890931 is an equidigital number, since it uses as much as digits as its factorization.

140890931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807900.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 140890931 is about 11869.7485651550. The cubic root of 140890931 is about 520.3485471411.

The spelling of 140890931 in words is "one hundred forty million, eight hundred ninety thousand, nine hundred thirty-one".