140662169 has 2 divisors, whose sum is σ = 140662170. Its totient is φ = 140662168.

The previous prime is 140662121. The next prime is 140662189. The reversal of 140662169 is 961266041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140114569 + 547600 = 11837^2 + 740^2 .

It is an emirp because it is prime and its reverse (961266041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140662169 - 2²⁴ = 123884953 is a prime.

It is a super-2 number, since 2×140662169² = 39571691575569122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140662189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70331084 + 70331085.

It is an arithmetic number, because the mean of its divisors is an integer number (70331085).

Almost surely, 2^140662169 is an apocalyptic number.

It is an amenable number.

140662169 is a deficient number, since it is larger than the sum of its proper divisors (1).

140662169 is an equidigital number, since it uses as much as digits as its factorization.

140662169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 140662169 is about 11860.1083047331. The cubic root of 140662169 is about 520.0667678073.

The spelling of 140662169 in words is "one hundred forty million, six hundred sixty-two thousand, one hundred sixty-nine".