140489138 has 4 divisors (see below), whose sum is σ = 210733710. Its totient is φ = 70244568.

The previous prime is 140489131. The next prime is 140489143. The reversal of 140489138 is 831984041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831984041 = 7 ⋅118854863.

It can be written as a sum of positive squares in only one way, i.e., 101263969 + 39225169 = 10063^2 + 6263^2 .

It is not an unprimeable number, because it can be changed into a prime (140489131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35122283 + ... + 35122286.

Almost surely, 2^140489138 is an apocalyptic number.

140489138 is a deficient number, since it is larger than the sum of its proper divisors (70244572).

140489138 is an equidigital number, since it uses as much as digits as its factorization.

140489138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70244571.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 140489138 is about 11852.8113964578. The cubic root of 140489138 is about 519.8534325582.

The spelling of 140489138 in words is "one hundred forty million, four hundred eighty-nine thousand, one hundred thirty-eight".