140423137 has 2 divisors, whose sum is σ = 140423138. Its totient is φ = 140423136.

The previous prime is 140423099. The next prime is 140423141. The reversal of 140423137 is 731324041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140398801 + 24336 = 11849^2 + 156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140423137 is a prime.

It is not a weakly prime, because it can be changed into another prime (140483137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70211568 + 70211569.

It is an arithmetic number, because the mean of its divisors is an integer number (70211569).

Almost surely, 2^140423137 is an apocalyptic number.

It is an amenable number.

140423137 is a deficient number, since it is larger than the sum of its proper divisors (1).

140423137 is an equidigital number, since it uses as much as digits as its factorization.

140423137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 140423137 is about 11850.0268776066. The cubic root of 140423137 is about 519.7720117421.

Adding to 140423137 its reverse (731324041), we get a palindrome (871747178).

The spelling of 140423137 in words is "one hundred forty million, four hundred twenty-three thousand, one hundred thirty-seven".