1264293493 has 4 divisors (see below), whose sum is σ = 1264393260. Its totient is φ = 1264193728.

The previous prime is 1264293487. The next prime is 1264293529. The reversal of 1264293493 is 3943924621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1151041329 + 113252164 = 33927^2 + 10642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264293493 - 2¹⁷ = 1264162421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264233493) 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, 27538 + ... + 57331.

It is an arithmetic number, because the mean of its divisors is an integer number (316098315).

Almost surely, 2^1264293493 is an apocalyptic number.

It is an amenable number.

1264293493 is a deficient number, since it is larger than the sum of its proper divisors (99767).

1264293493 is an equidigital number, since it uses as much as digits as its factorization.

1264293493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99766.

The product of its digits is 279936, while the sum is 43.

The square root of 1264293493 is about 35556.9049974826. The cubic root of 1264293493 is about 1081.3077131902.

The spelling of 1264293493 in words is "one billion, two hundred sixty-four million, two hundred ninety-three thousand, four hundred ninety-three".