64229779 has 4 divisors (see below), whose sum is σ = 64367784. Its totient is φ = 64091776.

The previous prime is 64229773. The next prime is 64229797. The reversal of 64229779 is 97792246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97792246 = 2 ⋅48896123.

It is a cyclic number.

It is not a de Polignac number, because 64229779 - 2¹³ = 64221587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64229773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68302 + ... + 69235.

It is an arithmetic number, because the mean of its divisors is an integer number (16091946).

Almost surely, 2^64229779 is an apocalyptic number.

64229779 is a deficient number, since it is larger than the sum of its proper divisors (138005).

64229779 is a wasteful number, since it uses less digits than its factorization.

64229779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138004.

The product of its digits is 381024, while the sum is 46.

The square root of 64229779 is about 8014.3483203564. The cubic root of 64229779 is about 400.4781344908.

The spelling of 64229779 in words is "sixty-four million, two hundred twenty-nine thousand, seven hundred seventy-nine".