140406073 has 2 divisors, whose sum is σ = 140406074. Its totient is φ = 140406072.

The previous prime is 140406041. The next prime is 140406107. The reversal of 140406073 is 370604041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106440489 + 33965584 = 10317^2 + 5828^2 .

It is an emirp because it is prime and its reverse (370604041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140406073 - 2⁵ = 140406041 is a prime.

It is a super-3 number, since 3×140406073³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (140406173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70203036 + 70203037.

It is an arithmetic number, because the mean of its divisors is an integer number (70203037).

Almost surely, 2^140406073 is an apocalyptic number.

It is an amenable number.

140406073 is a deficient number, since it is larger than the sum of its proper divisors (1).

140406073 is an equidigital number, since it uses as much as digits as its factorization.

140406073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 140406073 is about 11849.3068573651. The cubic root of 140406073 is about 519.7509569285.

The spelling of 140406073 in words is "one hundred forty million, four hundred six thousand, seventy-three".