140378081 has 2 divisors, whose sum is σ = 140378082. Its totient is φ = 140378080.

The previous prime is 140378059. The next prime is 140378087. The reversal of 140378081 is 180873041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128709025 + 11669056 = 11345^2 + 3416^2 .

It is a cyclic number.

It is not a de Polignac number, because 140378081 - 2²² = 136183777 is a prime.

It is a super-2 number, since 2×140378081² = 39412011250485122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140378087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70189040 + 70189041.

It is an arithmetic number, because the mean of its divisors is an integer number (70189041).

Almost surely, 2^140378081 is an apocalyptic number.

It is an amenable number.

140378081 is a deficient number, since it is larger than the sum of its proper divisors (1).

140378081 is an equidigital number, since it uses as much as digits as its factorization.

140378081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 140378081 is about 11848.1256323521. The cubic root of 140378081 is about 519.7164146531.

The spelling of 140378081 in words is "one hundred forty million, three hundred seventy-eight thousand, eighty-one".