64429919 has 4 divisors (see below), whose sum is σ = 64615944. Its totient is φ = 64243896.

The previous prime is 64429907. The next prime is 64429921. The reversal of 64429919 is 91992446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64429919 is a prime.

It is a super-2 number, since 2×64429919² = 8302428924693122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64429919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64429219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92492 + ... + 93185.

It is an arithmetic number, because the mean of its divisors is an integer number (16153986).

Almost surely, 2^64429919 is an apocalyptic number.

64429919 is a deficient number, since it is larger than the sum of its proper divisors (186025).

64429919 is a wasteful number, since it uses less digits than its factorization.

64429919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186024.

The product of its digits is 139968, while the sum is 44.

The square root of 64429919 is about 8026.8249638322. The cubic root of 64429919 is about 400.8936664969.

It can be divided in two parts, 6442 and 9919, that added together give a palindrome (16361).

The spelling of 64429919 in words is "sixty-four million, four hundred twenty-nine thousand, nine hundred nineteen".