140386421789 has 2 divisors, whose sum is σ = 140386421790. Its totient is φ = 140386421788.

The previous prime is 140386421771. The next prime is 140386421797. The reversal of 140386421789 is 987124683041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86500692100 + 53885729689 = 294110^2 + 232133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140386421789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140386421789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140386421729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70193210894 + 70193210895.

It is an arithmetic number, because the mean of its divisors is an integer number (70193210895).

Almost surely, 2^140386421789 is an apocalyptic number.

It is an amenable number.

140386421789 is a deficient number, since it is larger than the sum of its proper divisors (1).

140386421789 is an equidigital number, since it uses as much as digits as its factorization.

140386421789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 140386421789 in words is "one hundred forty billion, three hundred eighty-six million, four hundred twenty-one thousand, seven hundred eighty-nine".