64494831 has 4 divisors (see below), whose sum is σ = 85993112. Its totient is φ = 42996552.

The previous prime is 64494827. The next prime is 64494853. The reversal of 64494831 is 13849446.

It is a happy number.

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

It is not a de Polignac number, because 64494831 - 2² = 64494827 is a prime.

It is a super-2 number, since 2×64494831² = 8319166451437122, 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 64494831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64494631) 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, 10749136 + ... + 10749141.

It is an arithmetic number, because the mean of its divisors is an integer number (21498278).

Almost surely, 2^64494831 is an apocalyptic number.

64494831 is a deficient number, since it is larger than the sum of its proper divisors (21498281).

64494831 is a wasteful number, since it uses less digits than its factorization.

64494831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21498280.

The product of its digits is 82944, while the sum is 39.

The square root of 64494831 is about 8030.8673877733. The cubic root of 64494831 is about 401.0282523943.

The spelling of 64494831 in words is "sixty-four million, four hundred ninety-four thousand, eight hundred thirty-one".