140939749 has 2 divisors, whose sum is σ = 140939750. Its totient is φ = 140939748.

The previous prime is 140939723. The next prime is 140939779. The reversal of 140939749 is 947939041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140896900 + 42849 = 11870^2 + 207^2 .

It is a cyclic number.

It is not a de Polignac number, because 140939749 - 2⁵ = 140939717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140939699 and 140939708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140939719) 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 as a sum of consecutive naturals, namely, 70469874 + 70469875.

It is an arithmetic number, because the mean of its divisors is an integer number (70469875).

Almost surely, 2^140939749 is an apocalyptic number.

It is an amenable number.

140939749 is a deficient number, since it is larger than the sum of its proper divisors (1).

140939749 is an equidigital number, since it uses as much as digits as its factorization.

140939749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 140939749 is about 11871.8047911849. The cubic root of 140939749 is about 520.4086395872.

The spelling of 140939749 in words is "one hundred forty million, nine hundred thirty-nine thousand, seven hundred forty-nine".