1064692091 has 4 divisors (see below), whose sum is σ = 1071743184. Its totient is φ = 1057641000.

The previous prime is 1064692061. The next prime is 1064692093. The reversal of 1064692091 is 1902964601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1064692091 is a prime.

It is a super-2 number, since 2×1064692091² = 2267138497275904562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1064692093) 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, 3525320 + ... + 3525621.

It is an arithmetic number, because the mean of its divisors is an integer number (267935796).

Almost surely, 2^1064692091 is an apocalyptic number.

1064692091 is a deficient number, since it is larger than the sum of its proper divisors (7051093).

1064692091 is an equidigital number, since it uses as much as digits as its factorization.

1064692091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051092.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1064692091 is about 32629.6198414876. The cubic root of 1064692091 is about 1021.1150471049.

The spelling of 1064692091 in words is "one billion, sixty-four million, six hundred ninety-two thousand, ninety-one".