1064778691 has 2 divisors, whose sum is σ = 1064778692. Its totient is φ = 1064778690.

The previous prime is 1064778667. The next prime is 1064778707. The reversal of 1064778691 is 1968774601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1064778691 - 2²⁷ = 930560963 is a prime.

It is a super-2 number, since 2×1064778691² = 2267507321615346962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1064778661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532389345 + 532389346.

It is an arithmetic number, because the mean of its divisors is an integer number (532389346).

Almost surely, 2^1064778691 is an apocalyptic number.

1064778691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1064778691 is an equidigital number, since it uses as much as digits as its factorization.

1064778691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 1064778691 is about 32630.9468296585. The cubic root of 1064778691 is about 1021.1427315301.

The spelling of 1064778691 in words is "one billion, sixty-four million, seven hundred seventy-eight thousand, six hundred ninety-one".