140428349 has 2 divisors, whose sum is σ = 140428350. Its totient is φ = 140428348.

The previous prime is 140428333. The next prime is 140428361. The reversal of 140428349 is 943824041.

140428349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123765625 + 16662724 = 11125^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 140428349 - 2⁴ = 140428333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140428369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70214174 + 70214175.

It is an arithmetic number, because the mean of its divisors is an integer number (70214175).

Almost surely, 2^140428349 is an apocalyptic number.

It is an amenable number.

140428349 is a deficient number, since it is larger than the sum of its proper divisors (1).

140428349 is an equidigital number, since it uses as much as digits as its factorization.

140428349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 140428349 is about 11850.2467906791. The cubic root of 140428349 is about 519.7784423495.

The spelling of 140428349 in words is "one hundred forty million, four hundred twenty-eight thousand, three hundred forty-nine".