140385797 has 4 divisors (see below), whose sum is σ = 140439756. Its totient is φ = 140331840.

The previous prime is 140385793. The next prime is 140385803. The reversal of 140385797 is 797583041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 797583041 = 113 ⋅7058257.

It can be written as a sum of positive squares in 2 ways, for example, as 44169316 + 96216481 = 6646^2 + 9809^2 .

It is a cyclic number.

It is not a de Polignac number, because 140385797 - 2² = 140385793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140385793) 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, 22868 + ... + 28349.

It is an arithmetic number, because the mean of its divisors is an integer number (35109939).

Almost surely, 2^140385797 is an apocalyptic number.

It is an amenable number.

140385797 is a deficient number, since it is larger than the sum of its proper divisors (53959).

140385797 is an equidigital number, since it uses as much as digits as its factorization.

140385797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53958.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 140385797 is about 11848.4512490030. The cubic root of 140385797 is about 519.7259366961.

The spelling of 140385797 in words is "one hundred forty million, three hundred eighty-five thousand, seven hundred ninety-seven".