140473687 has 2 divisors, whose sum is σ = 140473688. Its totient is φ = 140473686.

The previous prime is 140473661. The next prime is 140473693. The reversal of 140473687 is 786374041.

It is a strong prime.

It is an emirp because it is prime and its reverse (786374041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140473687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140473637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70236843 + 70236844.

It is an arithmetic number, because the mean of its divisors is an integer number (70236844).

Almost surely, 2^140473687 is an apocalyptic number.

140473687 is a deficient number, since it is larger than the sum of its proper divisors (1).

140473687 is an equidigital number, since it uses as much as digits as its factorization.

140473687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 140473687 is about 11852.1595922431. The cubic root of 140473687 is about 519.8343740270.

The spelling of 140473687 in words is "one hundred forty million, four hundred seventy-three thousand, six hundred eighty-seven".