64279491 has 8 divisors (see below), whose sum is σ = 85760784. Its totient is φ = 42825600.

The previous prime is 64279477. The next prime is 64279507. The reversal of 64279491 is 19497246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64279491 - 2⁶ = 64279427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64279291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (10720098).

Almost surely, 2^64279491 is an apocalyptic number.

64279491 is a deficient number, since it is larger than the sum of its proper divisors (21481293).

64279491 is a wasteful number, since it uses less digits than its factorization.

64279491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13701.

The product of its digits is 108864, while the sum is 42.

The square root of 64279491 is about 8017.4491579305. The cubic root of 64279491 is about 400.5814273627.

The spelling of 64279491 in words is "sixty-four million, two hundred seventy-nine thousand, four hundred ninety-one".