140001997 has 2 divisors, whose sum is σ = 140001998. Its totient is φ = 140001996.

The previous prime is 140001973. The next prime is 140002019. The reversal of 140001997 is 799100041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129367876 + 10634121 = 11374^2 + 3261^2 .

It is an emirp because it is prime and its reverse (799100041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140001997 - 2²³ = 131613389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140001907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70000998 + 70000999.

It is an arithmetic number, because the mean of its divisors is an integer number (70000999).

Almost surely, 2^140001997 is an apocalyptic number.

It is an amenable number.

140001997 is a deficient number, since it is larger than the sum of its proper divisors (1).

140001997 is an equidigital number, since it uses as much as digits as its factorization.

140001997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 140001997 is about 11832.2439545506. The cubic root of 140001997 is about 519.2518790807.

The spelling of 140001997 in words is "one hundred forty million, one thousand, nine hundred ninety-seven".