140345389 has 2 divisors, whose sum is σ = 140345390. Its totient is φ = 140345388.

The previous prime is 140345383. The next prime is 140345393. The reversal of 140345389 is 983543041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89151364 + 51194025 = 9442^2 + 7155^2 .

It is a cyclic number.

It is not a de Polignac number, because 140345389 - 2²⁷ = 6127661 is a prime.

It is a super-2 number, since 2×140345389² = 39393656427122642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140345383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70172694 + 70172695.

It is an arithmetic number, because the mean of its divisors is an integer number (70172695).

Almost surely, 2^140345389 is an apocalyptic number.

It is an amenable number.

140345389 is a deficient number, since it is larger than the sum of its proper divisors (1).

140345389 is an equidigital number, since it uses as much as digits as its factorization.

140345389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 140345389 is about 11846.7459245145. The cubic root of 140345389 is about 519.6760667393.

The spelling of 140345389 in words is "one hundred forty million, three hundred forty-five thousand, three hundred eighty-nine".