140208769 has 2 divisors, whose sum is σ = 140208770. Its totient is φ = 140208768.

The previous prime is 140208751. The next prime is 140208773. The reversal of 140208769 is 967802041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116316225 + 23892544 = 10785^2 + 4888^2 .

It is a cyclic number.

It is not a de Polignac number, because 140208769 - 2⁷ = 140208641 is a prime.

It is a super-2 number, since 2×140208769² = 39316997808990722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140208779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70104384 + 70104385.

It is an arithmetic number, because the mean of its divisors is an integer number (70104385).

Almost surely, 2^140208769 is an apocalyptic number.

It is an amenable number.

140208769 is a deficient number, since it is larger than the sum of its proper divisors (1).

140208769 is an equidigital number, since it uses as much as digits as its factorization.

140208769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 140208769 is about 11840.9783801846. The cubic root of 140208769 is about 519.5073848062.

The spelling of 140208769 in words is "one hundred forty million, two hundred eight thousand, seven hundred sixty-nine".