1064640273 has 4 divisors (see below), whose sum is σ = 1419520368. Its totient is φ = 709760180.

The previous prime is 1064640271. The next prime is 1064640277. The reversal of 1064640273 is 3720464601.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 1064640273 - 2¹ = 1064640271 is a prime.

It is a super-2 number, since 2×1064640273² = 2266917821787029058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1064640271) 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, 177440043 + ... + 177440048.

It is an arithmetic number, because the mean of its divisors is an integer number (354880092).

Almost surely, 2^1064640273 is an apocalyptic number.

It is an amenable number.

1064640273 is a deficient number, since it is larger than the sum of its proper divisors (354880095).

1064640273 is an equidigital number, since it uses as much as digits as its factorization.

1064640273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354880094.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 1064640273 is about 32628.8257986707. The cubic root of 1064640273 is about 1021.0984811267.

The spelling of 1064640273 in words is "one billion, sixty-four million, six hundred forty thousand, two hundred seventy-three".