1091634461 has 4 divisors (see below), whose sum is σ = 1110136800. Its totient is φ = 1073132124.

The previous prime is 1091634457. The next prime is 1091634491. The reversal of 1091634461 is 1644361901.

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 1091634461 - 2² = 1091634457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091634431) 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, 9251081 + ... + 9251198.

It is an arithmetic number, because the mean of its divisors is an integer number (277534200).

Almost surely, 2^1091634461 is an apocalyptic number.

It is an amenable number.

1091634461 is a deficient number, since it is larger than the sum of its proper divisors (18502339).

1091634461 is an equidigital number, since it uses as much as digits as its factorization.

1091634461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18502338.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1091634461 is about 33039.8919641091. The cubic root of 1091634461 is about 1029.6566112674.

The spelling of 1091634461 in words is "one billion, ninety-one million, six hundred thirty-four thousand, four hundred sixty-one".