1264326697 has 4 divisors (see below), whose sum is σ = 1265856336. Its totient is φ = 1262797060.

The previous prime is 1264326683. The next prime is 1264326733. The reversal of 1264326697 is 7966234621.

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: 7966234621 = 23 ⋅346358027.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264326697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264326617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763579 + ... + 765232.

It is an arithmetic number, because the mean of its divisors is an integer number (316464084).

Almost surely, 2^1264326697 is an apocalyptic number.

It is an amenable number.

1264326697 is a deficient number, since it is larger than the sum of its proper divisors (1529639).

1264326697 is an equidigital number, since it uses as much as digits as its factorization.

1264326697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529638.

The product of its digits is 653184, while the sum is 46.

The square root of 1264326697 is about 35557.3719079462. The cubic root of 1264326697 is about 1081.3171791955.

It can be divided in two parts, 12643 and 26697, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 1264326697 in words is "one billion, two hundred sixty-four million, three hundred twenty-six thousand, six hundred ninety-seven".