140323861 has 2 divisors, whose sum is σ = 140323862. Its totient is φ = 140323860.

The previous prime is 140323817. The next prime is 140323871. The reversal of 140323861 is 168323041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119902500 + 20421361 = 10950^2 + 4519^2 .

It is an emirp because it is prime and its reverse (168323041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140323861 - 2⁹ = 140323349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140323871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70161930 + 70161931.

It is an arithmetic number, because the mean of its divisors is an integer number (70161931).

Almost surely, 2^140323861 is an apocalyptic number.

It is an amenable number.

140323861 is a deficient number, since it is larger than the sum of its proper divisors (1).

140323861 is an equidigital number, since it uses as much as digits as its factorization.

140323861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 140323861 is about 11845.8372857304. The cubic root of 140323861 is about 519.6494938239.

The spelling of 140323861 in words is "one hundred forty million, three hundred twenty-three thousand, eight hundred sixty-one".