140230661 has 2 divisors, whose sum is σ = 140230662. Its totient is φ = 140230660.

The previous prime is 140230589. The next prime is 140230663. The reversal of 140230661 is 166032041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130188100 + 10042561 = 11410^2 + 3169^2 .

It is a cyclic number.

It is not a de Polignac number, because 140230661 - 2²² = 136036357 is a prime.

Together with 140230663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140230663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70115330 + 70115331.

It is an arithmetic number, because the mean of its divisors is an integer number (70115331).

Almost surely, 2^140230661 is an apocalyptic number.

It is an amenable number.

140230661 is a deficient number, since it is larger than the sum of its proper divisors (1).

140230661 is an equidigital number, since it uses as much as digits as its factorization.

140230661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 140230661 is about 11841.9027609586. The cubic root of 140230661 is about 519.5344217832.

The spelling of 140230661 in words is "one hundred forty million, two hundred thirty thousand, six hundred sixty-one".