140645387 has 2 divisors, whose sum is σ = 140645388. Its totient is φ = 140645386.

The previous prime is 140645363. The next prime is 140645423. The reversal of 140645387 is 783546041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140645387 - 2²⁰ = 139596811 is a prime.

It is a super-2 number, since 2×140645387² = 39562249768759538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 140645387.

It is not a weakly prime, because it can be changed into another prime (140645327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70322693 + 70322694.

It is an arithmetic number, because the mean of its divisors is an integer number (70322694).

Almost surely, 2^140645387 is an apocalyptic number.

140645387 is a deficient number, since it is larger than the sum of its proper divisors (1).

140645387 is an equidigital number, since it uses as much as digits as its factorization.

140645387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 140645387 is about 11859.4007858745. The cubic root of 140645387 is about 520.0460844265.

The spelling of 140645387 in words is "one hundred forty million, six hundred forty-five thousand, three hundred eighty-seven".