1264441393 has 4 divisors (see below), whose sum is σ = 1330990960. Its totient is φ = 1197891828.

The previous prime is 1264441391. The next prime is 1264441417. The reversal of 1264441393 is 3931444621.

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: 3931444621 = 13 ⋅302418817.

It is a cyclic number.

It is not a de Polignac number, because 1264441393 - 2¹ = 1264441391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264441391) 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, 33274755 + ... + 33274792.

It is an arithmetic number, because the mean of its divisors is an integer number (332747740).

Almost surely, 2^1264441393 is an apocalyptic number.

It is an amenable number.

1264441393 is a deficient number, since it is larger than the sum of its proper divisors (66549567).

1264441393 is an equidigital number, since it uses as much as digits as its factorization.

1264441393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66549566.

The product of its digits is 62208, while the sum is 37.

The square root of 1264441393 is about 35558.9847014788. The cubic root of 1264441393 is about 1081.3498761784.

The spelling of 1264441393 in words is "one billion, two hundred sixty-four million, four hundred forty-one thousand, three hundred ninety-three".