64429669 has 2 divisors, whose sum is σ = 64429670. Its totient is φ = 64429668.

The previous prime is 64429661. The next prime is 64429709. The reversal of 64429669 is 96692446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57988225 + 6441444 = 7615^2 + 2538^2 .

It is a cyclic number.

It is not a de Polignac number, because 64429669 - 2³ = 64429661 is a prime.

It is a super-2 number, since 2×64429669² = 8302364494899122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3808999 and since 64429669 and 3808999 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64429661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32214834 + 32214835.

It is an arithmetic number, because the mean of its divisors is an integer number (32214835).

Almost surely, 2^64429669 is an apocalyptic number.

It is an amenable number.

64429669 is a deficient number, since it is larger than the sum of its proper divisors (1).

64429669 is an equidigital number, since it uses as much as digits as its factorization.

64429669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 46.

The square root of 64429669 is about 8026.8093910345. The cubic root of 64429669 is about 400.8931479824.

The spelling of 64429669 in words is "sixty-four million, four hundred twenty-nine thousand, six hundred sixty-nine".