1064642893 has 4 divisors (see below), whose sum is σ = 1064953440. Its totient is φ = 1064332348.

The previous prime is 1064642881. The next prime is 1064642899. The reversal of 1064642893 is 3982464601.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3982464601 = 2801 ⋅1421801.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1064642893 is a prime.

It is a super-2 number, since 2×1064642893² = 2266928979230818898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1064642899) 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, 150073 + ... + 157006.

It is an arithmetic number, because the mean of its divisors is an integer number (266238360).

Almost surely, 2^1064642893 is an apocalyptic number.

It is an amenable number.

1064642893 is a deficient number, since it is larger than the sum of its proper divisors (310547).

1064642893 is an equidigital number, since it uses as much as digits as its factorization.

1064642893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310546.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 1064642893 is about 32628.8659471947. The cubic root of 1064642893 is about 1021.0993187416.

The spelling of 1064642893 in words is "one billion, sixty-four million, six hundred forty-two thousand, eight hundred ninety-three".