140319391 has 2 divisors, whose sum is σ = 140319392. Its totient is φ = 140319390.

The previous prime is 140319349. The next prime is 140319407. The reversal of 140319391 is 193913041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140319391 - 2¹⁵ = 140286623 is a prime.

It is a super-2 number, since 2×140319391² = 39379062981221762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140319341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70159695 + 70159696.

It is an arithmetic number, because the mean of its divisors is an integer number (70159696).

Almost surely, 2^140319391 is an apocalyptic number.

140319391 is a deficient number, since it is larger than the sum of its proper divisors (1).

140319391 is an equidigital number, since it uses as much as digits as its factorization.

140319391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 140319391 is about 11845.6486103548. The cubic root of 140319391 is about 519.6439759742.

The spelling of 140319391 in words is "one hundred forty million, three hundred nineteen thousand, three hundred ninety-one".