140448430981 has 2 divisors, whose sum is σ = 140448430982. Its totient is φ = 140448430980.

The previous prime is 140448430963. The next prime is 140448431047. The reversal of 140448430981 is 189034844041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131787150625 + 8661280356 = 363025^2 + 93066^2 .

It is a cyclic number.

It is not a de Polignac number, because 140448430981 - 2⁷ = 140448430853 is a prime.

It is a super-2 number, since 2×140448430981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140448430961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70224215490 + 70224215491.

It is an arithmetic number, because the mean of its divisors is an integer number (70224215491).

Almost surely, 2^140448430981 is an apocalyptic number.

It is an amenable number.

140448430981 is a deficient number, since it is larger than the sum of its proper divisors (1).

140448430981 is an equidigital number, since it uses as much as digits as its factorization.

140448430981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 140448430981 in words is "one hundred forty billion, four hundred forty-eight million, four hundred thirty thousand, nine hundred eighty-one".