140247187 has 2 divisors, whose sum is σ = 140247188. Its totient is φ = 140247186.

The previous prime is 140247181. The next prime is 140247197. The reversal of 140247187 is 781742041.

It is a weak prime.

It is an emirp because it is prime and its reverse (781742041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140247187 is a prime.

It is a super-2 number, since 2×140247187² = 39338546922825938, which contains 22 as substring.

It is equal to p_7925335 and since 140247187 and 7925335 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (140247181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70123593 + 70123594.

It is an arithmetic number, because the mean of its divisors is an integer number (70123594).

Almost surely, 2^140247187 is an apocalyptic number.

140247187 is a deficient number, since it is larger than the sum of its proper divisors (1).

140247187 is an equidigital number, since it uses as much as digits as its factorization.

140247187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 140247187 is about 11842.6005167784. The cubic root of 140247187 is about 519.5548297989.

The spelling of 140247187 in words is "one hundred forty million, two hundred forty-seven thousand, one hundred eighty-seven".