140331407 has 2 divisors, whose sum is σ = 140331408. Its totient is φ = 140331406.

The previous prime is 140331371. The next prime is 140331409. The reversal of 140331407 is 704133041.

140331407 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 140331407 - 2²² = 136137103 is a prime.

Together with 140331409, 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 (140331409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70165703 + 70165704.

It is an arithmetic number, because the mean of its divisors is an integer number (70165704).

Almost surely, 2^140331407 is an apocalyptic number.

140331407 is a deficient number, since it is larger than the sum of its proper divisors (1).

140331407 is an equidigital number, since it uses as much as digits as its factorization.

140331407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 140331407 is about 11846.1557899599. The cubic root of 140331407 is about 519.6588084782.

Adding to 140331407 its reverse (704133041), we get a palindrome (844464448).

The spelling of 140331407 in words is "one hundred forty million, three hundred thirty-one thousand, four hundred seven".