1065678997 has 4 divisors (see below), whose sum is σ = 1066596480. Its totient is φ = 1064761516.

The previous prime is 1065678989. The next prime is 1065679001. The reversal of 1065678997 is 7998765601.

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.

It is a cyclic number.

It is not a de Polignac number, because 1065678997 - 2³ = 1065678989 is a prime.

It is a super-2 number, since 2×1065678997² = 2271343449293852018, 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 (1065678697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456997 + ... + 459322.

It is an arithmetic number, because the mean of its divisors is an integer number (266649120).

Almost surely, 2^1065678997 is an apocalyptic number.

It is an amenable number.

1065678997 is a deficient number, since it is larger than the sum of its proper divisors (917483).

1065678997 is an equidigital number, since it uses as much as digits as its factorization.

1065678997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917482.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The square root of 1065678997 is about 32644.7391933218. The cubic root of 1065678997 is about 1021.4304538979.

The spelling of 1065678997 in words is "one billion, sixty-five million, six hundred seventy-eight thousand, nine hundred ninety-seven".