64429923 has 16 divisors (see below), whose sum is σ = 89991936. Its totient is φ = 40925280.

The previous prime is 64429921. The next prime is 64429957. The reversal of 64429923 is 32992446.

It is not a de Polignac number, because 64429923 - 2¹ = 64429921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64429921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17428 + ... + 20798.

It is an arithmetic number, because the mean of its divisors is an integer number (5624496).

Almost surely, 2^64429923 is an apocalyptic number.

64429923 is a deficient number, since it is larger than the sum of its proper divisors (25562013).

64429923 is a wasteful number, since it uses less digits than its factorization.

64429923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674.

The product of its digits is 93312, while the sum is 39.

The square root of 64429923 is about 8026.8252129967. The cubic root of 64429923 is about 400.8936747931.

The spelling of 64429923 in words is "sixty-four million, four hundred twenty-nine thousand, nine hundred twenty-three".