140621207 has 2 divisors, whose sum is σ = 140621208. Its totient is φ = 140621206.

The previous prime is 140621179. The next prime is 140621209. The reversal of 140621207 is 702126041.

140621207 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 is a cyclic number.

It is not a de Polignac number, because 140621207 - 2¹⁴ = 140604823 is a prime.

Together with 140621209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140621209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70310603 + 70310604.

It is an arithmetic number, because the mean of its divisors is an integer number (70310604).

Almost surely, 2^140621207 is an apocalyptic number.

140621207 is a deficient number, since it is larger than the sum of its proper divisors (1).

140621207 is an equidigital number, since it uses as much as digits as its factorization.

140621207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 140621207 is about 11858.3812976308. The cubic root of 140621207 is about 520.0162803088.

Adding to 140621207 its reverse (702126041), we get a palindrome (842747248).

The spelling of 140621207 in words is "one hundred forty million, six hundred twenty-one thousand, two hundred seven".