140656469 has 2 divisors, whose sum is σ = 140656470. Its totient is φ = 140656468.

The previous prime is 140656441. The next prime is 140656471. The reversal of 140656469 is 964656041.

140656469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97911025 + 42745444 = 9895^2 + 6538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140656469 is a prime.

It is a super-2 number, since 2×140656469² = 39568484543095922, which contains 22 as substring.

Together with 140656471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140656489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70328234 + 70328235.

It is an arithmetic number, because the mean of its divisors is an integer number (70328235).

Almost surely, 2^140656469 is an apocalyptic number.

It is an amenable number.

140656469 is a deficient number, since it is larger than the sum of its proper divisors (1).

140656469 is an equidigital number, since it uses as much as digits as its factorization.

140656469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 140656469 is about 11859.8680009518. The cubic root of 140656469 is about 520.0597428893.

It can be divided in two parts, 1406 and 56469, that added together give a palindrome (57875).

The spelling of 140656469 in words is "one hundred forty million, six hundred fifty-six thousand, four hundred sixty-nine".