140231387 has 2 divisors, whose sum is σ = 140231388. Its totient is φ = 140231386.

The previous prime is 140231359. The next prime is 140231407. The reversal of 140231387 is 783132041.

It is a strong prime.

It is an emirp because it is prime and its reverse (783132041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140231387 - 2⁶ = 140231323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140231347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70115693 + 70115694.

It is an arithmetic number, because the mean of its divisors is an integer number (70115694).

Almost surely, 2^140231387 is an apocalyptic number.

140231387 is a deficient number, since it is larger than the sum of its proper divisors (1).

140231387 is an equidigital number, since it uses as much as digits as its factorization.

140231387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 140231387 is about 11841.9334147765. The cubic root of 140231387 is about 519.5353183568.

The spelling of 140231387 in words is "one hundred forty million, two hundred thirty-one thousand, three hundred eighty-seven".