140781617 has 2 divisors, whose sum is σ = 140781618. Its totient is φ = 140781616.

The previous prime is 140781587. The next prime is 140781623. The reversal of 140781617 is 716187041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115691536 + 25090081 = 10756^2 + 5009^2 .

It is a cyclic number.

It is not a de Polignac number, because 140781617 - 2¹⁸ = 140519473 is a prime.

It is not a weakly prime, because it can be changed into another prime (140781637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70390808 + 70390809.

It is an arithmetic number, because the mean of its divisors is an integer number (70390809).

Almost surely, 2^140781617 is an apocalyptic number.

It is an amenable number.

140781617 is a deficient number, since it is larger than the sum of its proper divisors (1).

140781617 is an equidigital number, since it uses as much as digits as its factorization.

140781617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 140781617 is about 11865.1429405633. The cubic root of 140781617 is about 520.2139368720.

The spelling of 140781617 in words is "one hundred forty million, seven hundred eighty-one thousand, six hundred seventeen".