140009647 has 2 divisors, whose sum is σ = 140009648. Its totient is φ = 140009646.

The previous prime is 140009587. The next prime is 140009669. The reversal of 140009647 is 746900041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140009647 is a prime.

It is equal to p_7912705 and since 140009647 and 7912705 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140009687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70004823 + 70004824.

It is an arithmetic number, because the mean of its divisors is an integer number (70004824).

Almost surely, 2^140009647 is an apocalyptic number.

140009647 is a deficient number, since it is larger than the sum of its proper divisors (1).

140009647 is an equidigital number, since it uses as much as digits as its factorization.

140009647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 140009647 is about 11832.5672193316. The cubic root of 140009647 is about 519.2613365756.

Adding to 140009647 its reverse (746900041), we get a palindrome (886909688).

The spelling of 140009647 in words is "one hundred forty million, nine thousand, six hundred forty-seven".