1065612791 has 4 divisors (see below), whose sum is σ = 1065678432. Its totient is φ = 1065547152.

The previous prime is 1065612787. The next prime is 1065612827. The reversal of 1065612791 is 1972165601.

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 is a cyclic number.

It is not a de Polignac number, because 1065612791 - 2² = 1065612787 is a prime.

It is a super-2 number, since 2×1065612791² = 2271061240685619362, 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 (1065612731) 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, 11315 + ... + 47531.

It is an arithmetic number, because the mean of its divisors is an integer number (266419608).

Almost surely, 2^1065612791 is an apocalyptic number.

1065612791 is a deficient number, since it is larger than the sum of its proper divisors (65641).

1065612791 is an equidigital number, since it uses as much as digits as its factorization.

1065612791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65640.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1065612791 is about 32643.7251397570. The cubic root of 1065612791 is about 1021.4093011163.

The spelling of 1065612791 in words is "one billion, sixty-five million, six hundred twelve thousand, seven hundred ninety-one".