140582987 has 4 divisors (see below), whose sum is σ = 140712936. Its totient is φ = 140453040.

The previous prime is 140582983. The next prime is 140583007. The reversal of 140582987 is 789285041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789285041 = 1091 ⋅723451.

It is a cyclic number.

It is not a de Polignac number, because 140582987 - 2² = 140582983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140582983) 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, 63338 + ... + 65519.

It is an arithmetic number, because the mean of its divisors is an integer number (35178234).

Almost surely, 2^140582987 is an apocalyptic number.

140582987 is a deficient number, since it is larger than the sum of its proper divisors (129949).

140582987 is a wasteful number, since it uses less digits than its factorization.

140582987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129948.

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

The square root of 140582987 is about 11856.7696696866. The cubic root of 140582987 is about 519.9691636053.

The spelling of 140582987 in words is "one hundred forty million, five hundred eighty-two thousand, nine hundred eighty-seven".