140061787 has 4 divisors (see below), whose sum is σ = 147433480. Its totient is φ = 132690096.

The previous prime is 140061773. The next prime is 140061791. The reversal of 140061787 is 787160041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787160041 = 277 ⋅2841733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140061787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140061767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3685818 + ... + 3685855.

It is an arithmetic number, because the mean of its divisors is an integer number (36858370).

Almost surely, 2^140061787 is an apocalyptic number.

140061787 is a deficient number, since it is larger than the sum of its proper divisors (7371693).

140061787 is an equidigital number, since it uses as much as digits as its factorization.

140061787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7371692.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 140061787 is about 11834.7702554802. The cubic root of 140061787 is about 519.3257867201.

The spelling of 140061787 in words is "one hundred forty million, sixty-one thousand, seven hundred eighty-seven".