140673509 has 2 divisors, whose sum is σ = 140673510. Its totient is φ = 140673508.

The previous prime is 140673499. The next prime is 140673539. The reversal of 140673509 is 905376041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108784900 + 31888609 = 10430^2 + 5647^2 .

It is a cyclic number.

It is not a de Polignac number, because 140673509 - 2⁴ = 140673493 is a prime.

It is a super-2 number, since 2×140673509² = 39578072268746162, which contains 22 as substring.

It is equal to p_7948025 and since 140673509 and 7948025 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140673539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70336754 + 70336755.

It is an arithmetic number, because the mean of its divisors is an integer number (70336755).

Almost surely, 2^140673509 is an apocalyptic number.

It is an amenable number.

140673509 is a deficient number, since it is larger than the sum of its proper divisors (1).

140673509 is an equidigital number, since it uses as much as digits as its factorization.

140673509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 140673509 is about 11860.5863683041. The cubic root of 140673509 is about 520.0807431326.

It can be divided in two parts, 14067 and 3509, that added together give a cube (17576 = 26³).

The spelling of 140673509 in words is "one hundred forty million, six hundred seventy-three thousand, five hundred nine".