140806969 has 2 divisors, whose sum is σ = 140806970. Its totient is φ = 140806968.

The previous prime is 140806961. The next prime is 140806979. The reversal of 140806969 is 969608041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102515625 + 38291344 = 10125^2 + 6188^2 .

It is an emirp because it is prime and its reverse (969608041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140806969 - 2³ = 140806961 is a prime.

It is a super-2 number, since 2×140806969² = 39653205037933922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140806961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70403484 + 70403485.

It is an arithmetic number, because the mean of its divisors is an integer number (70403485).

Almost surely, 2^140806969 is an apocalyptic number.

It is an amenable number.

140806969 is a deficient number, since it is larger than the sum of its proper divisors (1).

140806969 is an equidigital number, since it uses as much as digits as its factorization.

140806969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 140806969 is about 11866.2112318971. The cubic root of 140806969 is about 520.2451617635.

The spelling of 140806969 in words is "one hundred forty million, eight hundred six thousand, nine hundred sixty-nine".