140156437 has 2 divisors, whose sum is σ = 140156438. Its totient is φ = 140156436.

The previous prime is 140156431. The next prime is 140156461. The reversal of 140156437 is 734651041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136212241 + 3944196 = 11671^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 140156437 - 2¹¹ = 140154389 is a prime.

It is a super-3 number, since 3×140156437³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140156399 and 140156408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140156431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70078218 + 70078219.

It is an arithmetic number, because the mean of its divisors is an integer number (70078219).

Almost surely, 2^140156437 is an apocalyptic number.

It is an amenable number.

140156437 is a deficient number, since it is larger than the sum of its proper divisors (1).

140156437 is an equidigital number, since it uses as much as digits as its factorization.

140156437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 140156437 is about 11838.7683903352. The cubic root of 140156437 is about 519.4427425260.

The spelling of 140156437 in words is "one hundred forty million, one hundred fifty-six thousand, four hundred thirty-seven".