140985881 has 2 divisors, whose sum is σ = 140985882. Its totient is φ = 140985880.

The previous prime is 140985877. The next prime is 140985931. The reversal of 140985881 is 188589041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 64947481 = 8720^2 + 8059^2 .

It is a cyclic number.

It is not a de Polignac number, because 140985881 - 2² = 140985877 is a prime.

It is a super-2 number, since 2×140985881² = 39754037282692322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140985851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70492940 + 70492941.

It is an arithmetic number, because the mean of its divisors is an integer number (70492941).

Almost surely, 2^140985881 is an apocalyptic number.

It is an amenable number.

140985881 is a deficient number, since it is larger than the sum of its proper divisors (1).

140985881 is an equidigital number, since it uses as much as digits as its factorization.

140985881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 44.

The square root of 140985881 is about 11873.7475550055. The cubic root of 140985881 is about 520.4654129546.

The spelling of 140985881 in words is "one hundred forty million, nine hundred eighty-five thousand, eight hundred eighty-one".