140345399 has 2 divisors, whose sum is σ = 140345400. Its totient is φ = 140345398.

The previous prime is 140345393. The next prime is 140345411. The reversal of 140345399 is 993543041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140345399 - 2⁴ = 140345383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140345393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70172699 + 70172700.

It is an arithmetic number, because the mean of its divisors is an integer number (70172700).

Almost surely, 2^140345399 is an apocalyptic number.

140345399 is a deficient number, since it is larger than the sum of its proper divisors (1).

140345399 is an equidigital number, since it uses as much as digits as its factorization.

140345399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 140345399 is about 11846.7463465713. The cubic root of 140345399 is about 519.6760790821.

The spelling of 140345399 in words is "one hundred forty million, three hundred forty-five thousand, three hundred ninety-nine".