140313661 has 2 divisors, whose sum is σ = 140313662. Its totient is φ = 140313660.

The previous prime is 140313653. The next prime is 140313673. The reversal of 140313661 is 166313041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96157636 + 44156025 = 9806^2 + 6645^2 .

It is an emirp because it is prime and its reverse (166313041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140313661 - 2³ = 140313653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140413661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70156830 + 70156831.

It is an arithmetic number, because the mean of its divisors is an integer number (70156831).

Almost surely, 2^140313661 is an apocalyptic number.

It is an amenable number.

140313661 is a deficient number, since it is larger than the sum of its proper divisors (1).

140313661 is an equidigital number, since it uses as much as digits as its factorization.

140313661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 140313661 is about 11845.4067469209. The cubic root of 140313661 is about 519.6369025862.

The spelling of 140313661 in words is "one hundred forty million, three hundred thirteen thousand, six hundred sixty-one".