140823665 has 16 divisors (see below), whose sum is σ = 183768912. Its totient is φ = 103163904.

The previous prime is 140823659. The next prime is 140823671. The reversal of 140823665 is 566328041.

It is an interprime number because it is at equal distance from previous prime (140823659) and next prime (140823671).

It can be written as a sum of positive squares in 8 ways, for example, as 47720464 + 93103201 = 6908^2 + 9649^2 .

It is a cyclic number.

It is not a de Polignac number, because 140823665 - 2¹⁴ = 140807281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19244 + ... + 25533.

It is an arithmetic number, because the mean of its divisors is an integer number (11485557).

Almost surely, 2^140823665 is an apocalyptic number.

It is an amenable number.

140823665 is a deficient number, since it is larger than the sum of its proper divisors (42945247).

140823665 is a wasteful number, since it uses less digits than its factorization.

140823665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44836.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 140823665 is about 11866.9147211902. The cubic root of 140823665 is about 520.2657234114.

The spelling of 140823665 in words is "one hundred forty million, eight hundred twenty-three thousand, six hundred sixty-five".