64860249 has 4 divisors (see below), whose sum is σ = 86480336. Its totient is φ = 43240164.

The previous prime is 64860247. The next prime is 64860251. The reversal of 64860249 is 94206846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (64860247) and next prime (64860251).

It is not a de Polignac number, because 64860249 - 2¹ = 64860247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64860247) 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, 10810039 + ... + 10810044.

It is an arithmetic number, because the mean of its divisors is an integer number (21620084).

Almost surely, 2^64860249 is an apocalyptic number.

It is an amenable number.

64860249 is a deficient number, since it is larger than the sum of its proper divisors (21620087).

64860249 is a wasteful number, since it uses less digits than its factorization.

64860249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21620086.

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

The square root of 64860249 is about 8053.5860956471. The cubic root of 64860249 is about 401.7842150254.

The spelling of 64860249 in words is "sixty-four million, eight hundred sixty thousand, two hundred forty-nine".