140921393 has 2 divisors, whose sum is σ = 140921394. Its totient is φ = 140921392.

The previous prime is 140921357. The next prime is 140921471. The reversal of 140921393 is 393129041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100560784 + 40360609 = 10028^2 + 6353^2 .

It is a cyclic number.

It is not a de Polignac number, because 140921393 - 2²⁴ = 124144177 is a prime.

It is not a weakly prime, because it can be changed into another prime (140921293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70460696 + 70460697.

It is an arithmetic number, because the mean of its divisors is an integer number (70460697).

Almost surely, 2^140921393 is an apocalyptic number.

It is an amenable number.

140921393 is a deficient number, since it is larger than the sum of its proper divisors (1).

140921393 is an equidigital number, since it uses as much as digits as its factorization.

140921393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 140921393 is about 11871.0316737847. The cubic root of 140921393 is about 520.3860459238.

The spelling of 140921393 in words is "one hundred forty million, nine hundred twenty-one thousand, three hundred ninety-three".