140018407 has 2 divisors, whose sum is σ = 140018408. Its totient is φ = 140018406.

The previous prime is 140018399. The next prime is 140018423. The reversal of 140018407 is 704810041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140018407 - 2³ = 140018399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140018447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70009203 + 70009204.

It is an arithmetic number, because the mean of its divisors is an integer number (70009204).

Almost surely, 2^140018407 is an apocalyptic number.

140018407 is a deficient number, since it is larger than the sum of its proper divisors (1).

140018407 is an equidigital number, since it uses as much as digits as its factorization.

140018407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 140018407 is about 11832.9373783520. The cubic root of 140018407 is about 519.2721659114.

Adding to 140018407 its reverse (704810041), we get a palindrome (844828448).

The spelling of 140018407 in words is "one hundred forty million, eighteen thousand, four hundred seven".