140107391 has 2 divisors, whose sum is σ = 140107392. Its totient is φ = 140107390.

The previous prime is 140107339. The next prime is 140107399. The reversal of 140107391 is 193701041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140107391 - 2²² = 135913087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140107391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140107399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70053695 + 70053696.

It is an arithmetic number, because the mean of its divisors is an integer number (70053696).

Almost surely, 2^140107391 is an apocalyptic number.

140107391 is a deficient number, since it is larger than the sum of its proper divisors (1).

140107391 is an equidigital number, since it uses as much as digits as its factorization.

140107391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 140107391 is about 11836.6967942919. The cubic root of 140107391 is about 519.3821446169.

The spelling of 140107391 in words is "one hundred forty million, one hundred seven thousand, three hundred ninety-one".