140764081 has 2 divisors, whose sum is σ = 140764082. Its totient is φ = 140764080.

The previous prime is 140764009. The next prime is 140764109. The reversal of 140764081 is 180467041.

140764081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100821681 + 39942400 = 10041^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 140764081 - 2²³ = 132375473 is a prime.

It is a super-2 number, since 2×140764081² = 39629052999549122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140764181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70382040 + 70382041.

It is an arithmetic number, because the mean of its divisors is an integer number (70382041).

Almost surely, 2^140764081 is an apocalyptic number.

It is an amenable number.

140764081 is a deficient number, since it is larger than the sum of its proper divisors (1).

140764081 is an equidigital number, since it uses as much as digits as its factorization.

140764081 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 31.

The square root of 140764081 is about 11864.4039462587. The cubic root of 140764081 is about 520.1923363947.

The spelling of 140764081 in words is "one hundred forty million, seven hundred sixty-four thousand, eighty-one".