140206069 has 2 divisors, whose sum is σ = 140206070. Its totient is φ = 140206068.

The previous prime is 140206037. The next prime is 140206081. The reversal of 140206069 is 960602041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119639844 + 20566225 = 10938^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 140206069 - 2⁵ = 140206037 is a prime.

It is a super-2 number, since 2×140206069² = 39315483568865522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140206669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70103034 + 70103035.

It is an arithmetic number, because the mean of its divisors is an integer number (70103035).

Almost surely, 2^140206069 is an apocalyptic number.

It is an amenable number.

140206069 is a deficient number, since it is larger than the sum of its proper divisors (1).

140206069 is an equidigital number, since it uses as much as digits as its factorization.

140206069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 140206069 is about 11840.8643687866. The cubic root of 140206069 is about 519.5040500672.

The spelling of 140206069 in words is "one hundred forty million, two hundred six thousand, sixty-nine".