102040140409 has 2 divisors, whose sum is σ = 102040140410. Its totient is φ = 102040140408.

The previous prime is 102040140337. The next prime is 102040140469. The reversal of 102040140409 is 904041040201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94511975184 + 7528165225 = 307428^2 + 86765^2 .

It is a cyclic number.

It is not a de Polignac number, because 102040140409 - 2²¹ = 102038043257 is a prime.

It is not a weakly prime, because it can be changed into another prime (102040140469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51020070204 + 51020070205.

It is an arithmetic number, because the mean of its divisors is an integer number (51020070205).

Almost surely, 2^102040140409 is an apocalyptic number.

It is an amenable number.

102040140409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102040140409 is an equidigital number, since it uses as much as digits as its factorization.

102040140409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 102040140409 in words is "one hundred two billion, forty million, one hundred forty thousand, four hundred nine".